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radgrid virtualscrollpagging issue

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This is a migrated thread and some comments may be shown as answers.
Prab
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Prab asked on 12 Jun 2012, 01:07 PM
javascript:

    
function RadGrid1_Command(sender, args)
 {
           args.set_cancel(
true);
            debugger;
            
var currentPageIndex = sender.get_masterTableView().get_currentPageIndex();
            
var pageSize = sender.get_masterTableView().get_pageSize();
....................................................................
............................................................
......................................................................
..............................................................
}
function updateGrid(result) {
 
var tableView = $find(document.getElementById("hdnradgridclientid").value).get_masterTableView();
            tableView.set_dataSource(result);
            tableView.dataBind();
        }
       
function updateVirtualItemCount(result)
{
          
var tableView = $find(document.getElementById("hdnradgridclientid").value).get_masterTableView();
          tableView.set_virtualItemCount(result);
        }       
 

<
telerik:RadGrid ID="RadGridAssessment" EnableViewState="false" Width="100%" runat="server" 
        AllowSorting="True" Height="430px" AllowMultiRowSelection="true" AllowPaging="true"
     GridLines="None" BorderWidth="0" AutoGenerateColumns="true" PagerStyle-AlwaysVisible="false"
     Skin="Vista" OnNeedDataSource="RadGrid1_NeedDataSource">
                <PagerStyle Visible="false" />
               <MasterTableView Width="99%">
                  </MasterTableView>
                <ClientSettings EnableRowHoverStyle="true">
               <ClientEvents OnCommand="RadGrid1_Command" />
               <Selecting AllowRowSelect="True"></Selecting>
              <Scrolling AllowScroll="true" EnableVirtualScrollPaging="true" UseStaticHeaders="true"
                 ScrollHeight="275px" SaveScrollPosition="True"></Scrolling>
                     </ClientSettings>
 </telerik:RadGrid>
the above codings are using in my code....and in my pageload i set  
RadGridAssessment.PageSize = 5;
the problem is.if the grid contains 6 to 9 rows means...i am unable to view second page..but if above ten means its working fine...
and i set RadGridAssessment.PageSize = 10; ..at the time if grid contains 11 to 20 records..i am unable to view second page...
please help me 

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Prab
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