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MVC application problem when running out of Network Service.

Posted By:      Posted Date: September 22, 2010    Points: 0   Category :ASP.Net
 

Hello,

I am hosting an ASP.NET MVC 2 application on its own application pool.

Everything works fine if the application pool is running on Network Service with Full Control.

If I make the application pool to run on its application pool identity, even with full control, the web site runs ok but on every page with a form I get the following error:

"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.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: 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 how to solve this problem?

Thank You,

Miguel




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