Unable to open the item \MailG:ExhsrverMDBDATA23e.str-skipped

Hi,
When I am trying to perform a backup operation in Exchange, I’m getting an error message telling “Unable to open the item \MailG:ExhsrverMDBDATA23e.str-skipped.” It seems to be attempting to create a flat file backup (exchange database).
Can anyone give me any suggestions on how to resolve this issue?
