Server Error in '/' Application.

[msman88]

I have an error:
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Server Error in '/' 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.

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.

Source Error:

[No relevant source lines]
Source File: c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temp orary ASP.NET Files\root\73d80b1a\b734cf0d\App_Web_gtsojhm9.16.c s Line: 0
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guide me

 

[ca8msm]

What have you tried so far? What server setup do you have in terms of what the error message is telling you? What does the stack trace say?

Mark,

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