Backup to a New Tape Every Night

I want to create a backup that will let me use a new tape every night. Even thought I tell the Backup to eject the tape after each backup, it still appends to the the same tape.

Thanks!

Backup Exec 2014  Version 14.1 Rev. 1786.1059 (64-bit)

HP MSL G3 Series Autoloader, 1 HP Ultrium 5 tape drive.