SQL SERVER 2000 Legato Tape Recovery

I have SQL Server 2000 Standard Version backups going to Disk then we have Legato Networker Software to make backups of these backup directories to TAPE.

When we retrieve the file from the TAPE and use to recover the database we get the following errors: (Notice some work and some do not. This is from command 'restore verifyonly from disk='

Server: Msg 3242, Level 16, State 2, Line 1
The file on device '\backupfilersqlbackupsqlserver
ecovered_iis_mainsqlbackupsqlserveriss_mainiss_main_tlog_200709210130.TRN' is not a valid Microsoft Tape Format backup set.
Server: Msg 3013, Level 16, State 1, Line 1
VERIFY DATABASE is terminating abnormally.
The backup set is valid.
The backup set is valid.
Server: Msg 3242, Level 16, State 1, Line 4
The file on device '\backupfilersqlbackupsqlserver
ecovered_iis_mainsqlbackupsqlserveriss_mainiss_main_tlog_200709180130.TRN' is not a valid Microsoft Tape Format backup set.
Server: Msg 3013, Level 16, State 1, Line 4
VERIFY DATABASE is terminating abnormally.
The backup set is valid.
The backup set is valid.

If I take the original backup file that are on disk they are all valid.

Thanks for any help that can lead me to the solution

Mike