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Webpage has expired

Posted By:      Posted Date: April 14, 2011    Points: 0   Category :Windows Application

Hello all,

I am doing a code conversion from ASP to ASP.Net.

On my page i have a grid with paging implemented and on each row of the grid there is a link that take us to the modify  page. 

In the legacy application, when i click on any row in the grid(Not the .Net grid but the grid made up of labels and controls) after sorting and go the Modify page. If i click the BROWSER BACK button then the previous page is shown perfectly alright.

In the converted code, if i repeat the scenario and press the BROWSER BACK button then the webpage has expired error is shown by the browser.

I am using IE-8.

What can be the reason and how can i fix this ?

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