samba quit working...

[Southeastern Computer Services]

I've had a redhat 7.0 server running as a primary domain controller for months with no problems, but this morning I am having problems.  The smb and nmb processes are running properly but when I try to use smbclient to transfer some data files from a win2k computer to the redhat system, I get the following error:

"session setup failed  ERRSRV 2242"

Any suggestions?  One thing to note.  We had a power outage yesterday and my ups failed to keep the system up.  Thanks for any help.
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