Row Selection not working

[Abdulaziz]

I have radgride in my aspx page but when i show my page in browser can not see row selection i don't know why
note : property AllowMultiRowSelection="true" 
- I use VS2010 Frameworke 4 ,VB.net

<telerik:RadGrid ID="RadGrid1" ShowGroupPanel="True" ShowStatusBar="true"

       runat="server" DataSourceID="SqlDataSource1" Width="95%" AutoGenerateColumns="False"

       PageSize="15" AllowSorting="True" AllowMultiRowSelection="true" AllowPaging="True" GridLines="None" AllowFilteringByColumn="true">

       <PagerStyle Mode="NextPrevAndNumeric"></PagerStyle>

       <MasterTableView Width="100%" DataSourceID="SqlDataSource1" DataKeyNames="Class_ID" AllowMultiColumnSorting="True">

           <DetailTables>

               <telerik:GridTableView DataKeyNames="Client_id" DataSourceID="SqlDataSource2" Width="100%" runat="server">

                   <ParentTableRelation>

                       <telerik:GridRelationFields DetailKeyField="Class_ID" MasterKeyField="Class_ID" />

                   </ParentTableRelation>

                   <DetailTables>

                       <telerik:GridTableView DataKeyNames="Client_id" DataSourceID="SqlDataSource3" Width="100%" runat="server">

                           <ParentTableRelation>

                               <telerik:GridRelationFields DetailKeyField="Client_id" MasterKeyField="Client_id" />

                           </ParentTableRelation>

                           <Columns>

                               <telerik:GridBoundColumn SortExpression="Class_ID" HeaderText="Class_ID" DataField="Class_ID" UniqueName="Class_ID">

                               </telerik:GridBoundColumn>

                               <telerik:GridBoundColumn SortExpression="Course_Name" HeaderText="Course_Name" DataField="Course_Name" UniqueName="Course_Arabic_Name">

                               </telerik:GridBoundColumn>

                               <telerik:GridBoundColumn SortExpression="Client_id" HeaderText="Client_id" DataField="Client_id" UniqueName="Client_id">

                               </telerik:GridBoundColumn>

                           </Columns>

                           <SortExpressions>

                               <telerik:GridSortExpression FieldName="Client_id" SortOrder="Descending"></telerik:GridSortExpression>

                           </SortExpressions>

                       </telerik:GridTableView>

                   </DetailTables>

                   <Columns>

                       <telerik:GridBoundColumn SortExpression="Full_Arb_Nmae" HeaderText="Full_Arb_Nmae" DataField="Full_Arb_Nmae" UniqueName="Full_Arb_Nmae">

                       </telerik:GridBoundColumn>

                       <telerik:GridBoundColumn SortExpression="Client_id" HeaderText="Client_id" DataField="Client_id" UniqueName="Client_id">

                       </telerik:GridBoundColumn>

                   </Columns>

                   <SortExpressions>

                       <telerik:GridSortExpression FieldName="Client_id"></telerik:GridSortExpression>

                   </SortExpressions>

               </telerik:GridTableView>

           </DetailTables>

           <Columns>

               <telerik:GridBoundColumn SortExpression="Employee_Name" HeaderText="Employee_Name" DataField="Employee_Name" UniqueName="CustomerID">

               </telerik:GridBoundColumn>

               <telerik:GridBoundColumn SortExpression="Course_Name" HeaderText="Course_Name" DataField="Course_Name" UniqueName="Course_Name 
">

               </telerik:GridBoundColumn>

               <telerik:GridBoundColumn SortExpression="Start_Date" HeaderText="Start_Date" DataField="Start_Date" UniqueName="Start_Date">

               </telerik:GridBoundColumn>

           </Columns>

           <SortExpressions>

               <telerik:GridSortExpression FieldName="Course_Arabic_Name"></telerik:GridSortExpression>

           </SortExpressions>

       </MasterTableView>

       <ClientSettings ReorderColumnsOnClient="True" AllowDragToGroup="True" AllowColumnsReorder="True">

           <Resizing AllowRowResize="True" AllowColumnResize="True"></Resizing>

       </ClientSettings>

   </telerik:RadGrid>

any one can help me

[Jayesh Goyani]

Hello,

You also have to set below property.

<ClientSettings>
               <Selecting AllowRowSelect="true" />
           </ClientSettings>

Thanks,
Jayesh Goyani

[Abdulaziz]

Thanks , work fine