PV 114X drive goes offline in Backup Exec 2010 if media is not overwritable

I am using Backup Exec 2010 R3 to backup servers using B2D2T.  The tape drive is a Dell PowerVault 114X LTO5 drive (using the Backup Exec drivers) and  whenever the a tape is not overwritable, Backup Exec issues a Media Insert alert as expected but does not eject the tape and after a short amount of time the drive appears as offline under the devices tab and another alert is issued to state that the drive is offline.

I can only eject the tape and bring the drive online again after cancelling the job, restarting the Backup Exec services and then restarting the tape drive (the tape drive is connected by a SAS connection).

Any advice or help would be much appreciated.

Thanks,

Chris