Hello Ray,
Thankyou for your query.
Please refer to the following technote.
When stopping and restarting the Removable Storage service, or upon a reboot, a pop up appears stating "Configuration for device Changer0 failed" and the event log returns the message "Unable to auto-configure library unit Changer0."
http://support.veritas.com/docs/236992
We believe this should resolve your issue.
We also assume that the Removable Storage Service has been stopped and deactivated. If not, please deactivate it as Backup Exec demand complete control over the device and this is not possible when RSM is started.
NOTE : If we do not receive your reply within two business days, this post would be marked ‘assumed answered’ and would be moved to ‘answered questions’ pool.