Invalid postback or callback argument.

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C#

ASP.NET

i am using delete button within repeater control,when i press on delete it show fallowing error-
and repeater does not bind data after delete .i am binding data within(!postback)
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.

plz help me .