Validation of viewstate MAC failed

hello,

I'm deploying an MVC2 App and I'm having this problem.

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.


I already saw this thread:
http://community.discountasp.net/showthread.php?t=12941
http://community.discountasp.net/showthread.php?t=2719
http://community.discountasp.net/showthread.php?t=9605

I already tried all the solutions mentioned in this thread's but nothing resolves my problem.
Here is My web.config

<machineKey validationKey="88229FF53AE13DF382843079C45CABEE91CC97DCD0A780516C84026FE9939B42EEDD88AE81F05CF663D1EEF0C77DAAA888C9B42181FDDFDB2C1D17C0A297FBE4" decryptionKey="12D2245EC89F731BA61897653CD8851C49BC857DB3F37B69D6D790F5B9DE31AD" validation="SHA1" decryption="AES" />

<pages validateRequest="false"
pageParserFilterType="System.Web.Mvc.ViewTypeParserFilter, System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
pageBaseType="System.Web.Mvc.ViewPage, System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
userControlBaseType="System.Web.Mvc.ViewUserControl, System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" enableViewStateMac="true">

<authentication mode="Forms">
<forms loginUrl="~/Account/LogOn" timeout="2880" />
</authentication>


Could you help me please.
Thanks a Lot

 

do you have a URL to see the error page?

 

Hello @jayc

Apparently the problem was my navigator, once I deleted the cookies, the problem dissapeared, by now of course.
Thanks for your interest
Best regards

 

Glad you got the problem worked out.