Hi,
i followed the below url to integrate cutesoft chat with SharePoint 2010.
http://cutesoft.net/ASP.NET%2BChat/Deployment/CuteChatforSharePoint/Deployment.htm
After completion of step 7, while i publish the masterpage got the below 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.
Please do needful.
Thanks,
balaram.