Error while editing data in gridview in ASP.NET -


i making online bug tracking system(bts) in asp.net. using gridview displaying records on web page. working in web forms in web forms, getting error given below when click edit event of gridview. please guide me solve error.

server error in '/bts' application.

invalid postback or callback argument. event validation enabled using
<pages enableeventvalidation="true"/>
in configuration or
<%@ page enableeventvalidation="true" %>
in page. security purposes, feature verifies arguments postback or callback events originate server control rendered them. if data valid , expected, use clientscriptmanager.registerforeventvalidation method in order register postback or callback data validation.

just --> enableeventvalidation="false" below

 <%@ page title="" language="c#" masterpagefile="~/shirish.master" autoeventwireup="true"     codefile="s.aspx.cs" inherits="_s" enableeventvalidation="false" %>

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