We have many grids with a Footer with aggregates that work fine but this grid shows the footer but none of the aggregates display, in other words the footer is blank?
<telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="False"
OnItemCreated="RadGrid1_ItemCreated"
OnItemDataBound="RadGrid1_ItemDataBound"
ShowFooter="true"
Width="1101px" AllowPaging="True" AllowSorting="True" AllowCustomPaging="True" PageSize="20">
<ClientSettings EnableRowHoverStyle="True">
<Selecting AllowRowSelect="True" />
</ClientSettings>
<MasterTableView DataKeyNames="ID" CommandItemDisplay="Top" CommandItemSettings-ShowPrintButton="true" CommandItemSettings-ShowRefreshButton="true" CommandItemSettings-ShowExportToExcelButton="true">
<CommandItemSettings ShowAddNewRecordButton="False" ShowExportToCsvButton="true" ShowExportToExcelButton="true" ShowPrintButton="true" />
<Columns>
<telerik:GridBoundColumn DataField="ID" FilterControlAltText="Filter ID column" HeaderText="ID" SortExpression="ID" UniqueName="ID" Display="false">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="ClientID" FilterControlAltText="Filter ClientID column" HeaderText="ClientID" SortExpression="ClientID" UniqueName="ClientID" Display="false">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="PractitionerID" FilterControlAltText="Filter PractitionerID column" HeaderText="PractitionerID" SortExpression="PractitionerID" UniqueName="PractitionerID" Display="false">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="Start" UniqueName="apptDT" Display="false">
</telerik:GridBoundColumn>
<telerik:GridTemplateColumn HeaderText="Date" DataField="Start" UniqueName="AppointmentEdit" Visible="true" SortExpression="Start">
<ItemTemplate>
<asp:HyperLink ID="lnkStart" Text='<%# String.Format("{0:g}", DataBinder.Eval(Container.DataItem, "Start")) %>' runat="server"></asp:HyperLink>
</ItemTemplate>
<ItemStyle Width="250px" HorizontalAlign="Center" Font-Size="9" />
<HeaderStyle HorizontalAlign="Center" />
</telerik:GridTemplateColumn>
<telerik:GridBoundColumn DataField="lname" UniqueName="lname" Display="true" HeaderText="Practitioner">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="DESCRIPTION" UniqueName="DESCRIPTION" HeaderText="Services" Display="true">
<ItemStyle Width="100px" HorizontalAlign="Left" />
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="Units" DataType="System.Int16" UniqueName="Units" HeaderText="Units" Display="true" Aggregate="Sum" FooterAggregateFormatString="{0:c}">
<ItemStyle Width="100px" HorizontalAlign="Left" />
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="Status" FilterControlAltText="Filter Status column" HeaderText="Status" SortExpression="Status" UniqueName="Status" Display="true">
<ItemStyle Width="100px" HorizontalAlign="Center" />
<HeaderStyle Width="100px" HorizontalAlign="Center" />
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="Tests" HeaderText="Tests" UniqueName="Tests" Display="true">
<ItemStyle Width="500px" HorizontalAlign="Left" />
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="InvoiceIDX" UniqueName="InvoiceIDX" Display="false">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="InvoiceAmount" HeaderText="Invoice Amount" SortExpression="InvoiceAmount" UniqueName="InvoiceAmount" DataFormatString="{0:c}" Aggregate="Sum" FooterText="$">
<ItemStyle Width="40px" HorizontalAlign="Center" />
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="InvoiceAmountPaid" HeaderText="Amount Paid" SortExpression="InvoiceAmountPaid" UniqueName="InvoiceAmountPaid" DataFormatString="{0:c}" Aggregate="Sum" FooterText="$">
<ItemStyle Width="40px" HorizontalAlign="Center" />
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="UnitPrice" DataType="System.Decimal" FilterControlAltText="Filter UnitPrice column" HeaderText="Unit Price" SortExpression="UnitPrice" UniqueName="UnitPrice" DataFormatString="{0:$#,##0.00}">
<ItemStyle Width="40px" />
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="Billable" DataType="System.Decimal" FilterControlAltText="Filter Billable column" HeaderText="Billable" SortExpression="Billable" UniqueName="Billable" DataFormatString="{0:$#,##0.00}" Aggregate="Sum" FooterText="$">
<ItemStyle Width="40px" />
</telerik:GridBoundColumn>
</Columns>
</MasterTableView>
</telerik:RadGrid>