radGridResults.ExportSettings.IgnorePaging = true;

radGridResults.ExportSettings.OpenInNewWindow = true;

radGridResults.MasterTableView.ExportToExcel();

I click on the button, get the Open/Save/Cancel window and save the file.  When I open it, I first get a window popped up that states "The file you are trying to open, 'RadGridExport.xls', is in a different format than specified by the file extension.  Verify that the file is not corrupted and is from a trusted source before opening the file.  Do you want to open the file now?".  I selected Yes and when it finally opens all I can see are the header titles, it does not appear that any of the row data has been exported.

What am I doing wrong?

I have the following code snippet:

<telerik:RadAjaxPanel runat="server" ID="ajaxpnlCosts">
    <table>
        <tr>
            <td>
                <asp:RadioButtonList runat="server" AutoPostBack="true" ID="radiolstCosts">
                    <asp:ListItem Enabled="true" Selected="False" Value="0" Text="FREE" />
                    <asp:ListItem Enabled="true" Selected="True" Value="1" Text="NOMINAL" />
                    <asp:ListItem Enabled="true" Selected="False" Value="2" Text="HIGH" />
                </asp:RadioButtonList>
            </td>
        </tr>
    </table>
</telerik:RadAjaxPanel>

I use this code in a Content(Placeholder) control (Master page based layout).
The following problem happen: When I choose a new radiobutton at first Ajax call works fine.
At the second new radiobutton choose it's do a complete normal postback instead of Ajax postback.
With RadAjaxManager during the "postback" the whole table disappear!?!

Can U tell me why?

thx,
Gábor