The web-server is set to time-out at 20 minutes. So, after 20-minutes that my pages are sitting still (idle), if I click on a control, I receive the following error.
I went the below link and added the recommend code to my web.config file, but still my pages will time-out after 20-minutes. Whet so I need to do?
Server Error in '/NSOnlineCRMS' Application.
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.
See http://go.microsoft.com/fwlink/?LinkID=314055 for more information.
Description: An unhandled exception occurred during the execution of the current web request. Please review ...
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