Invaild Postback or Callback

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.NET2.0

.NET

Hi All,

i am developing c#.net with asp.net application.when i am running my application in production i am getting the following error.but it can not be reproduced some times.I am using Ajax in my application with master page concept.

The error is:

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.

How to avoid this error.Pls help me

Thanks In advance.