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View State Error when user tries to check in file

Posted By:      Posted Date: May 22, 2011    Points: 0   Category :C#

Recently we encounter issue with SharePoint 2007 that the user is unable to check in file. Whenever user try to check in file, it will show error page: 


Invalid viewstate.
Client IP: [IP Address]
Port: 58105
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; WOW64; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729)
ViewState: /wEWCQKOxPCTDQKPztqIBgKpn5bCCwLEiLTXBQKa/+iZBQKN/6CDBgKW/PDbDwLNrvW5AwLbqef0C9c8RUbYCyi0Rc58jgXqG3fOpsYC
Referer: [path]/Forms/AllItems.aspx
Path: /_layouts/Checkin.aspx


Any idea?? Thank you.

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