Invalid postback or callback argument

[niloofar]

hi
i use image button in rad grid
whern run program i have this error:

Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

not fire:   <asp:ImageButton   runat="server" CommandName="Select" ID="btnselect"  ImageUrl="~/Template/Images/icon_select.gif" />
fire:  <telerik:GridButtonColumn  CommandName="Select" Text="select"
                        UniqueName="column">
                    </telerik:GridButtonColumn>
help plz

[Pavlina]

Hi Niloofar,

Is it possible that you paste your complete mark-up and code-behind (please, use the code-formatter tool of the ticket editor to make the code snippets readable).

Regards,
Pavlina
the Telerik team