Quick help please :Radgrid Filter Problem.

I am trying to use filtering in Radgrid by this codes:

Asp:

​<telerik:RadGrid ID="ToolkitList" runat="server" AllowSorting="True" CssClass="RadGridCustomClass" OnNeedDataSource="ToolkitListNeedDataSource" AutoGenerateColumns="False" OnPreRender="ToolkitList_PreRender" Style="margin-right: 30px;" OnInit="ToolkitList_Init" OnUpdateCommand="ToolkitList_UpdateCommand" Width="1143px" OnItemDataBound="ToolkitList_ItemDataBound" OnItemCreated="ToolkitList_ItemCreated" OnItemCommand="ToolkitList_ItemCommand" >
<FilterMenu OnClientShowing="MenuShowing" />
<GroupingSettings CaseSensitive="False" />
<ClientSettings>
<ClientEvents OnFilterMenuShowing="filterMenuShowing" />
</ClientSettings>

<MasterTableView DataKeyNames="Toolkit ID,Progress,ProgressString,IsDistributed" GridLines="Vertical" EditMode="InPlace">
<PagerStyle Mode="NumericPages"></PagerStyle>
<RowIndicatorColumn Visible="False">
</RowIndicatorColumn>
<ExpandCollapseColumn Created="True">
</ExpandCollapseColumn>
<Columns>
<telerik:GridHyperLinkColumn DataNavigateUrlFields="Toolkit ID" SortExpression="Entity Name" AllowFiltering="true" AutoPostBackOnFilter="true" FilterControlAltText="Filter Entity Name column" DataNavigateUrlFormatString="~/Section/ToolkitIndex.aspx?_toolkitId={0}" DataTextField="Entity Name" DataTextFormatString="{0}" HeaderText="Entity Name" DataType="System.String" UniqueName="EntityName">

<HeaderStyle HorizontalAlign="Left" CssClass="gridheaderdark" ForeColor="white" />

</telerik:GridHyperLinkColumn>

<Telerik:GridImageColumn UniqueName="GridImageColumn" ShowFilterIcon="False" SortExpression="RestrictAccess" HeaderText="Restrict" DataImageUrlFields="RestrictAccess" HeaderImageUrl="~\Images\Restricted.png">
<HeaderStyle HorizontalAlign="Center" CssClass="gridheaderlight" ForeColor="white" />
</Telerik:GridImageColumn>

<telerik:GridBoundColumn AutoPostBackOnFilter="True" CurrentFilterFunction="Contains" DataField="Client Name" FilterControlAltText="Filter ClientName column" Groupable="False" HeaderText="Client Name" HtmlEncode="True" ReadOnly="true" SortExpression="Client Name" UniqueName="ClientName" DataType="System.String">
<ColumnValidationSettings>
<ModelErrorMessage Text="" />
</ColumnValidationSettings>
<HeaderStyle HorizontalAlign="Left" CssClass="gridheaderdark" ForeColor="white" />
</telerik:GridBoundColumn>

<telerik:GridBoundColumn AutoPostBackOnFilter="True" CurrentFilterFunction="Contains" DataField="Client Number" FilterControlAltText="Filter Client # column" Groupable="False" HeaderText="Client #" HtmlEncode="True" ReadOnly="true" SortExpression="Client Number" UniqueName="ClientNumber" DataType="System.String">
<ColumnValidationSettings>
<ModelErrorMessage Text="" />
</ColumnValidationSettings>
<ItemStyle HorizontalAlign="Center" Width="80px" />
<HeaderStyle HorizontalAlign="Center" Width="90px" CssClass="gridheaderlight" ForeColor="white"/>
</telerik:GridBoundColumn>

<telerik:GridBoundColumn AllowFiltering="true" AllowSorting="False" AutoPostBackOnFilter="True" CurrentFilterFunction="Contains" DataField="BKD Office" FilterControlAltText="Filter BKD Office column" Groupable="False" HeaderText="BKD Office" HtmlEncode="True" ReadOnly="true" SortExpression="BKD Office" UniqueName="BKDOffice" DataType="System.String">
<ColumnValidationSettings>
<ModelErrorMessage Text="" />
</ColumnValidationSettings>
<ItemStyle HorizontalAlign="Center" Width="80px" />
<HeaderStyle HorizontalAlign="Center" Width="90px" CssClass="gridheaderdark" ForeColor="white"/>
</telerik:GridBoundColumn>

<telerik:GridTemplateColumn AllowFiltering="False" DataField="Progress" FilterControlAltText="Filter ProgressBar column" Groupable="False" HeaderText="Progress" ReadOnly="True" Reorderable="False" Resizable="False" UniqueName="ProgressBar">
<EditItemTemplate>
<telerik:RadHtmlChart ID="ProgressBarChart" runat="server" Height="25px">
<Legend>
<Appearance Visible="false">
</Appearance>
</Legend>
<PlotArea>
<Appearance Visible="False">
</Appearance>
<XAxis Visible="False">
<MajorGridLines Visible="False" />
<MinorGridLines Visible="False" />
</XAxis>
<YAxis MaxValue="100" MinValue="0" Visible="False">
<MajorGridLines Visible="False" />
<MinorGridLines Visible="False" />
</YAxis>
<Series>
<telerik:BarSeries DataFieldY="Progress" Gap="0" Spacing="0">
<LabelsAppearance Position="InsideBase">
</LabelsAppearance>
<Appearance>
<FillStyle BackgroundColor="Green" />
</Appearance>
<TooltipsAppearance Color="White" DataFormatString="{0}%" />
</telerik:BarSeries>
</Series>
</PlotArea>
<Navigator>
<SelectionHint Visible="False">
</SelectionHint>
</Navigator>
</telerik:RadHtmlChart>
</EditItemTemplate>
<ItemTemplate>
<telerik:RadHtmlChart ID="ProgressBarChart" runat="server" Height="25px">
<Legend>
<Appearance Visible="false">
</Appearance>
</Legend>
<PlotArea>
<Appearance Visible="False">
</Appearance>
<XAxis Visible="False">
<MajorGridLines Visible="False" />
<MinorGridLines Visible="False" />
</XAxis>
<YAxis MaxValue="100" MinValue="0" Visible="False">
<MajorGridLines Visible="False" />
<MinorGridLines Visible="False" />
</YAxis>
<Series>
<telerik:BarSeries DataFieldY="Progress" Gap="0" Spacing="0">
<LabelsAppearance Position="InsideBase">
</LabelsAppearance>
<Appearance>
<FillStyle BackgroundColor="Green" />
</Appearance>
<TooltipsAppearance Color="White" DataFormatString="{0}%" />
</telerik:BarSeries>
</Series>
</PlotArea>
<Navigator>
<SelectionHint Visible="False">
</SelectionHint>
</Navigator>
</telerik:RadHtmlChart>
</ItemTemplate>
<ItemStyle Width="120px" />
<HeaderStyle CssClass="gridheaderlight" HorizontalAlign="Center" ForeColor="white"></HeaderStyle>
</telerik:GridTemplateColumn>

<telerik:GridDateTimeColumn AutoPostBackOnFilter="True" CurrentFilterFunction="EqualTo" FilterControlWidth="70px" DataField="Year End" DataFormatString="{0:M/d/yyyy}" DataType="System.DateTime" FilterControlAltText="Filter Year End column" Groupable="False" HeaderText="Year-End" ReadOnly="True" SortExpression="Year End" UniqueName="YearEnd">
<ItemStyle HorizontalAlign="Center" Width="80px" />
<HeaderStyle HorizontalAlign="Center" Width="90px" CssClass="gridheaderdark" ForeColor="white"/>
<ColumnValidationSettings>
<ModelErrorMessage Text="" />
</ColumnValidationSettings>
</telerik:GridDateTimeColumn>

<telerik:GridDateTimeColumn AutoPostBackOnFilter="True" CurrentFilterFunction="EqualTo" FilterControlWidth="70px" DataField="Distribution Date" DataFormatString="{0:M/d/yyyy}" DataType="System.DateTime" FilterControlAltText="Filter Distribution Date column" Groupable="False" HeaderText="Dist. Date" ReadOnly="true" SortExpression="Distribution Date" UniqueName="DistributionDate">
<ColumnValidationSettings>
<ModelErrorMessage Text="" />
</ColumnValidationSettings>
<ItemStyle HorizontalAlign="Center" Width="80px" />
<HeaderStyle HorizontalAlign="Center" Width="90px" CssClass="gridheaderlight" ForeColor="white"/>
</telerik:GridDateTimeColumn>

<telerik:GridDateTimeColumn AutoPostBackOnFilter="True" CurrentFilterFunction="EqualTo" FilterControlWidth="70px" DataField="Toolkit Due Date" DataFormatString="{0:M/d/yyyy}" DataType="System.DateTime" FilterControlAltText="Filter Toolkit Due Date column" Groupable="False" HeaderText="Toolkit Due" ReadOnly="False" SortExpression="Toolkit Due Date" UniqueName="ToolkitDueDate">
<ItemStyle HorizontalAlign="Center" Width="80px" />
<HeaderStyle HorizontalAlign="Center" Width="90px" CssClass="gridheaderdark" ForeColor="white"/>
<ColumnValidationSettings>
<ModelErrorMessage Text="" />
</ColumnValidationSettings>
</telerik:GridDateTimeColumn>


<telerik:GridDateTimeColumn AutoPostBackOnFilter="True" CurrentFilterFunction="EqualTo" DataField="Board Meeting Date" FilterControlWidth="70px" DataFormatString="{0:M/d/yyyy}" DataType="System.DateTime" FilterControlAltText="Filter Board Meeting Date column" Groupable="False" HeaderText="Board Mtg." ReadOnly="False" SortExpression="Board Meeting Date" UniqueName="BoardMeetingDate">
<ItemStyle HorizontalAlign="Center" Width="80px" />
<HeaderStyle HorizontalAlign="Center" Width="90px" CssClass="gridheaderlight" ForeColor="white"/>
<ColumnValidationSettings>
<ModelErrorMessage Text="" />
</ColumnValidationSettings>
</telerik:GridDateTimeColumn>



<telerik:GridBoundColumn AllowFiltering="False" AllowSorting="False" DataField="Progress" DataType="System.Int16" Display="False" FilterControlAltText="Filter Progress column" Groupable="False" HeaderText="Progress" ReadOnly="True" Reorderable="False" Resizable="False" ShowSortIcon="False" UniqueName="Progress">
<ColumnValidationSettings>
<ModelErrorMessage Text="" />
</ColumnValidationSettings>
</telerik:GridBoundColumn>

<telerik:GridBoundColumn AllowFiltering="False" AllowSorting="False" DataField="ProgressString" DataType="System.String" Display="False" FilterControlAltText="Filter Progress column" Groupable="False" HeaderText="ProgressString" ReadOnly="True" Reorderable="False" Resizable="False" ShowSortIcon="False" UniqueName="ProgressString">
<ColumnValidationSettings>
<ModelErrorMessage Text="" />
</ColumnValidationSettings>
</telerik:GridBoundColumn>

<telerik:GridBoundColumn AllowFiltering="False" AllowSorting="False" DataField="Toolkit ID" Display="false" Groupable="False" HeaderText="Toolkit ID" ReadOnly="true" Reorderable="False" Resizable="False" ShowSortIcon="False" UniqueName="ToolkitID">
<ColumnValidationSettings>
<ModelErrorMessage Text="" />
</ColumnValidationSettings>
</telerik:GridBoundColumn>

<telerik:GridBoundColumn AllowFiltering="False" DataField="Assigned" Groupable="False" HeaderText="Assigned" HtmlEncode="True" SortExpression="Assigned" UniqueName="Assigned" ReadOnly="true" Display="false">
<ColumnValidationSettings>
<ModelErrorMessage Text="" />
</ColumnValidationSettings>
</telerik:GridBoundColumn>

<telerik:GridBoundColumn AllowFiltering="False" DataField="RestrictAccess" Groupable="False" HeaderText="RestrictAccess" HtmlEncode="True" SortExpression="RestrictAccess" UniqueName="RestrictAccess" ReadOnly="true" Display="False" >
<ColumnValidationSettings>
<ModelErrorMessage Text="" />
</ColumnValidationSettings>
</telerik:GridBoundColumn>

<telerik:GridBoundColumn AllowFiltering="False" DataField="IsDistributed" Groupable="False" HeaderText="IsDistributed" HtmlEncode="True" SortExpression="IsDistributed" UniqueName="IsDistributed" ReadOnly="true" Display="False" >
<ColumnValidationSettings>
<ModelErrorMessage Text="" />
</ColumnValidationSettings>
</telerik:GridBoundColumn>
<telerik:GridEditCommandColumn ButtonType="ImageButton" ColumnGroupName="Actions" HeaderStyle-CssClass="header" UniqueName="EditCommandColumn" >
<HeaderStyle CssClass="header" />
<ItemStyle HorizontalAlign="Center" Width="15" CssClass="MergedBorder"/>
</telerik:GridEditCommandColumn>

<telerik:GridButtonColumn ButtonType="ImageButton" ColumnGroupName="Actions" HeaderStyle-CssClass="header" ImageUrl="~\Images\users-icon.png" UniqueName="ManageUserColumn" CommandName="Manageusers" >
<HeaderStyle CssClass="header"/>
<ItemStyle HorizontalAlign="Center" Width="5" CssClass="MergedBorder"/>
</telerik:GridButtonColumn>


<telerik:GridButtonColumn ButtonType="ImageButton" ColumnGroupName="Actions" HeaderStyle-CssClass="header" ImageUrl="~\Images\distribute.gif" UniqueName="DistributeColumn" CommandName="DistributeButtonColumn">
<HeaderStyle CssClass="header" />
<ItemStyle HorizontalAlign="Center" Width="5" CssClass="MergedBorder"/>
</telerik:GridButtonColumn>

<telerik:GridTemplateColumn UniqueName="DeleteColumn" ColumnGroupName="Actions" AllowFiltering="False">
<ItemTemplate>
<asp:ImageButton ID="DeleteImageButton" runat="server" AlternateText="Delete Toolkit" CommandName="Delete"
OnClientClick="javascript:if(!confirm('This action will delete the selected Toolkit. Are you sure?')){return false;}"
ImageUrl="~\Images\delete-icon.png" />
</ItemTemplate>
<HeaderStyle CssClass="header" />
<ItemStyle HorizontalAlign="Center" Width="5" CssClass="MergedBorder"/>
</telerik:GridTemplateColumn>

</Columns>
<ColumnGroups>
<telerik:GridColumnGroup HeaderStyle-HorizontalAlign="Center" HeaderText="Actions" Name="Actions" >
<HeaderStyle HorizontalAlign="Center" CssClass="gridheaderdark" ForeColor="white"/>

</telerik:GridColumnGroup>
</ColumnGroups>
<EditFormSettings>
<EditColumn UniqueName="EditCommandColumn" ButtonType="ImageButton" CancelImageUrl="~/RadControls/Grid/Skins/Default/Cancel.gif" UpdateImageUrl="~/RadControls/Grid/Skins/Default/Update.gif" >
</EditColumn>

<EditColumn FilterControlAltText="Filter EditCommandColumn1 column" UniqueName="EditCommandColumn1" >
</EditColumn>
</EditFormSettings>

</MasterTableView>

<FilterMenu OnClientShowing="MenuShowing" />
</telerik:RadGrid>
</telerik:RadAjaxPanel>


<telerik:RadCodeBlock ID="CustomizingFiltersBlock" runat="server">
<script type="text/javascript">
var column = null;

function MenuShowing(sender, args) {
if (column == null) return;
var menu = sender;
var items = menu.get_items();
if (column.get_dataType() == "System.String") {
var i = 0;
while (i < items.get_count()) {
if (!(items.getItem(i).get_value() in { 'Contains': '', 'DoesNotContain': '', 'StartsWith': '', 'EndsWith': '', 'IsEmpty': '', 'NotIsEmpty': '', 'NoFilter': '' })) {
var item = items.getItem(i);
if (item != null)
item.set_visible(false);
}
else {
var item = items.getItem(i);
if (item != null)
item.set_visible(true);
} i++;
}
}
if (column.get_dataType() == "System.UInt32") {
var j = 0;
while (j < items.get_count()) {
if (!(items.getItem(j).get_value() in { 'EqualTo': '', 'NotEqualTo': '', 'GreaterThan': '', 'GreaterThanOrEqualTo': '', 'LessThan': '', 'LessThanOrEqualTo': '', 'NoFilter': '' })) {
var item = items.getItem(j);
if (item != null)
item.set_visible(false);
} else {
var item = items.getItem(j);
if (item != null)
item.set_visible(true);
} j++;
}
}
if (column.get_dataType() == "System.DateTime") {
var j = 0;
while (j < items.get_count()) {
if (!(items.getItem(j).get_value() in { 'EqualTo': '', 'NotEqualTo': '', 'GreaterThan': '', 'GreaterThanOrEqualTo': '', 'LessThan': '', 'LessThanOrEqualTo': '', 'NoFilter': '' })) {
var item = items.getItem(j);
if (item != null)
item.set_visible(false);
} else {
var item = items.getItem(j);
if (item != null)
item.set_visible(true);
} j++;
}
}
//if (column.get_uniqueName() == "EIN") {
// var j = 0;
// while (j < items.get_count()) {
// if (!(items.getItem(j).get_value() in { 'NoFilter': ''})) {
// var item = items.getItem(j);
// if (item != null)
// item.set_visible(false);
// } else {
// var item = items.getItem(j);
// if (item != null)
// item.set_visible(true);
// } j++;
// }
//}
column = null;
menu.repaint();
}

function filterMenuShowing(sender, eventArgs) {
column = eventArgs.get_column();
}


</script>
</telerik:RadCodeBlock>

and  Cs code:

​protected void ToolkitList_Init(object sender, EventArgs e)
{

#region Ordering Filter Options

// Get the single server side filter list.
GridFilterMenu menu = ToolkitList.FilterMenu;

// Get the "No Filter" menu choice.
var noFilter = menu.Items.FindItemByText("No Filter");

// Moves "No Filter" To the bottom of the list.
menu.Items.Remove(noFilter);
menu.Items.Add(noFilter);

// Get the "Less Than" menu choice and index.
var lessThan = menu.Items.FindItemByText("Less Than");
int lessThanIndex = lessThan.Index;

// Get the "Greater Than Or Equal To" menu choice and index.
var greaterThanOrEqualTo = menu.Items.FindItemByText("Greater Than Or Equal To");
int greaterThanOrEqualToIndex = greaterThanOrEqualTo.Index;

// Pull the old switch them around trick.
menu.Items[lessThanIndex] = greaterThanOrEqualTo;
menu.Items[greaterThanOrEqualToIndex] = lessThan;

#endregion
}
​ protected void ToolkitList_PreRender(object sender, EventArgs e)
{
#region Selecting Default Menu Option

// Loop through all the columns
int i = 0;
while (i < ToolkitList.Columns.Count)
{
// Check to make sure that there is no filter text.
if (string.IsNullOrEmpty(ToolkitList.MasterTableView.Columns[i].CurrentFilterValue))
{
// If it is a string column assign it the default of contains.
if (ToolkitList.Columns[i].DataType.ToString() == "System.String")
{
ToolkitList.Columns[i].CurrentFilterFunction = GridKnownFunction.Contains;
}

// If it is an integer or date column assign it the default of equal to.
if (ToolkitList.Columns[i].DataType.ToString() == "System.UInt32" ||
ToolkitList.Columns[i].DataType.ToString() == "System.DateTime")
{
ToolkitList.Columns[i].CurrentFilterFunction = GridKnownFunction.EqualTo;
}
}

i++;
}

this.ToolkitList.Rebind();

#endregion
             GridColumn gridCol = ToolkitList.MasterTableView.GetColumn("EditCommandColumn");
gridCol.HeaderStyle.Width = Unit.Pixel(50);
          }

but I get this error :
0x800a139e - JavaScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: Index was out of range. Must be non-negative and less than the size of the collection.Parameter name: index

I need your help as soon as possible plz.