Actually on the veritas site... I found the exact problem:
TechNote Summary:
TechNote Title: How to automatically respond to informational alerts in Backup Exec for Windows NT and Windows 2000 version 8.x.
TechNote ID: 235873
Last Updated: April 19 2001 10:01 PM GMT
Related Documents: TechNote: 192055 - When performing a backup operation with Backup Exec for Windows NT v8.x, v7.3, v7.2 or v7.01 using a DLT or Travan tape drive or a tape drive controlled by RAIDirector, the backup hangs at 99% until the user responds to a tape eject prompt
This information in this TechNote applies to:
Products: Backup Exec for Windows NT/2000 8.5, 8.6, SBS 8.5, SBS 8.6
Subject: Application - Alert
Application - How To
Languages: English
Operating Systems: Windows 2000 Server 5.00.2195
Windows 2000 Advanced Server 5.00.2195
Windows 2000 Datacenter Server 5.00.2195
Windows NT 4.0 Serv, 4.0 Wkst
Windows NT Small Business Server 2000
http://seer.support.veritas.com/nav_bar/index.asp?content_sURL=%2Fsearch%5Fforms%2Ftechsearch%2Easp
Search Product: Backup Exec for WinNT and Win2000
Windows Platform: Windows 2000 Server
Search Phrase: Backup hangs
If I had your e-mail I could e-mail the solution to you. But if you input the above, you'll get the solution.
It is document number 253873 .