Hi, first of all sorry for my english and thanks for your help.

I'm using Net Advantage 2009.2, the Ajax Toolkit 40412 on Visual Studio 2008 and when I put a ModalPopUpExtender into a tempatecolumn of a UltraWebDataGrid I receive the error "there was an error rendering the control."

These was running ok in NetAdvantage For Net 2007 Vol 3 CLR 2.0 on Visual sutio 2005

The code is something like this

<igtbl:UltraWebGrid ID="uwgConversions" runat="server" Width="100%" OnInitializeRow="uwgConversions_InitializeRow" >
 <Bands>
  <igtbl:UltraGridBand>                                                                                                       
   <Columns>
    <igtbl:TemplatedColumn IsBound="True" Key="Editar" Width="40px">
     <CellTemplate>
      <table width="100%">
       <tr>
        <td align="center">
         <asp:ImageButton runat="server" ID="imgImagenEditarConversion" ImageUrl="Images/Edit.gif" OnClientClick="EdicionConversions()" CssClass="Hand" ToolTip="Edit"/>
         <asp:ModalPopupExtender ID="mpeConversion" runat="server" TargetControlID="imgImagenEditarConversion" PopupControlID="pnlConversions" CancelControlID="btnSalirConversions" BackgroundCssClass="modalBackground"></asp:ModalPopupExtender>
        </td>  
       </tr>
      </table>
     </CellTemplate>
     <Header Caption="Edit">
      <RowLayoutColumnInfo OriginX="15" />
     </Header>
    </igtbl:TemplatedColumn>
   </Columns>
  </igtbl:UltraGridBand>
 </Bands>
 <DisplayLayout AllowColSizingDefault="Free" BorderCollapseDefault="Separate"
 </DisplayLayout>
</igtbl:UltraWebGrid>