BACKUP , using 2 tapes per day in win2k , HELLLL!!!

I'm scheduling backups in windows2000 I'm using 2 tape per day , cause one is not enough. I schedule it according to Microsoft , prepare the tapes , write the label , schedule them , etc.
But When backup ask for the new media (the second tape) no matter what tape I use it keep asiking for it .I don't know what the hell backup is expecting.
Any suggestions ?

Not sure what the real question is, but the stuff buncdled with Microsoft is a stop gap program at best. I manage a small 10 server farm and back everything up nightly on 4 DLT tapes. 3 Servers per tape and my Biggest on the last tape. I use Backup Exec from Veritas and it works so well that I was able to give the tape changing duty to someone else. When there's a problem it notifys me!

Have fun and good luck!