NTBackup problems

I've installed a new Tape device without any problems. I've tested both drive and medias with HP test software, and everything seems allright. I'm getting the above error:

NTBACKUP LOG FILE: C:\Documents and Settings\SBS Backup User\Local Settings\Application Data\Microsoft\Windows NT\NTBackup\data\backup01.log
=====================<BEGIN NTBACKUP LOG FILE>=====================
Backup Status
Operation: Backup
Active backup destination: 4mm DDS
Media name: "Media created 04-02-2008 at 23:00"

The device reported an error on a request to MS_UpdateNtmsOmidInfo.
Error reported: 11.
There may be a hardware or media problem.
Please check the system event log for relevant failures.
An inconsistency was encountered on the media in 4mm DDS. Do not append to this media.
The operation was ended.
Backup completed on 04-02-2008 at 23:01.
Directories: 0
Files: 0
Bytes: 0
Time:  1 second

Error: C: is not a valid drive, or you do not have access.

The operation was ended.
Backup completed on 04-02-2008 at 23:01.
Directories: 0
Files: 0
Bytes: 0
Time:  1 second
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Toni UranjekConsultant/TrainerCommented:

Is "SBS Backup User" a member of Backup opertors group?


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