aspx page gives viewstate error

Posted by Priya10 on Stack Overflow See other posts from Stack Overflow or by Priya10
Published on 2011-02-15T15:19:47Z Indexed on 2011/02/15 15:25 UTC
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viewstate

Hi,

I have a simple aspx page with one grid view. When deployed on server, and accessed through that machine, it works fine. However, when connected through load balancer, we get this error ( when click on any button). The page however refreshes when pressed F5.

Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.

Any idea what is happening here???

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