microsoft sql-dmo (ODBC SQLState: 42000) when doing a tape backup on sql server 2000

I keep getting this error whenever i try to run a backup a tape drive.

microsoft sql-dmo (ODBC SQLState: 42000)
The media family on device 'TapeDrive' is incorrectly formed. SQL Server cannot process this medial family.  BACKUP DATABASE is terminating abnormally.

Does anyone know what this means?
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RimvisConnect With a Mentor Commented:
Does this helps/

Backup or Restore Using Large Transaction Logs May Return Error 3241

Do you have lates service packs applied?
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