Application stops working after some time

[mercede75]

I'm using Ext.NET with VS2008, ASP.NET. I have a unique problem for which I have not been able to find any solution.

There is a GridPanel with a toolbar in Topbar in a user control. the user control is added to the Webpage at design time. The Grid uses RowSelection Model. after selecting the row the user clicks the Delete button. a client side event is raised for confirmation following is the code snippet

<ext:Button ID="btnDelete" runat="server" Text="Delete" Icon="Delete">
                    <DirectEvents>
                        <Click OnEvent="Evt_Delete">
                        <ExtraParams>
                        <ext:Parameter Name="recordId" Value="(#{grdSanction}).selModel.getSelected().data.VoucherID" Mode="Raw" />
                        </ExtraParams>

                            <Confirmation Message="Do you really want to delete sanction?" ConfirmRequest="true"/>
                        </Click>
                    </DirectEvents>
                </ext:Button>

But the problem is that I after clicking yes I get the following message basically a 500 Internal Server Error

Below is what I find in Fiddler:

Result Protocol Host URL Body Caching Content-Type Process Comments Custom
1 500 HTTP onyx /pages/sanction.aspx?_dc=1337773867270 4,268 private text/html; charset=utf-8 chrome:920

Debugger of VS2008 does not work because the event on the code behind is never raised. other buttons on the toolbar work just fine.

Can anyone help me? I don't understand why this button has problem in raising the DirectEvent.

I've searched for similar errors but the closest I found was when a control was dynamically created which had to be created on every request. This UserControl is added to page at design time so I guess that solution does not apply here.