Error opening OWA 2010 for Single user :The item can't be opened because it's become corrupted.

Exception type: Microsoft.Exchange.Data.Storage.CorruptDataException
Exception
message: The configuration object data is corrupted.
Field = ConfigurationType.

Above error shows while opening particular user mailbox using OWA. Same is working lighter version OWA.

tried applying OWA mailbox policy also.Any suggestion.