can't inventory the tape drives

I am using Backup Exec 2010, Media Server: version 13.0 Rev. 2896 (32bit)

Quantum Super Loader 3 as backup tape library

It sees all the drives in 16 slots.  However, when I do the inventory on pre-existing drive, the job remained as Ready; Onhold

If I do inventory for the new inserted tape (which says "overwritable"), the job just say running, Bye Count is empty, Job Rate is empty, Percent Complete empty.  It looks to me it is not running as it is indicated.

I try to do unlock the Media Server - the job remains as Ready; On Hold. Tried to "run now" the job, it doesn't change the job status. 

I've tried to reboot the media server, paused and unpaused server, didn't help.

Please HELP