I have to start the Backup Exec 7.3 service manually. Otherwise starting the
program will ask me to Connect to Server. After providing necessary information,
the 'Application System Service Not Responding' error will come up. If I
start the service manually, the program runs fine.

However, I have to stop the service manually to eject the tape magazine.
I'm using Backup Exec 7.3 and Sony autoloader TSL-S7000.