Validation of viewstate mac failed. if this application is hosted by a web farm or cluster, ensure t
hi frnds.my dotnet product is now in live server.its working fine .but some times i got this 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."
what solution for this issue.pls reply. my server is windows hosting.product developed by vs2008