Locked Plextor PX-W1210S burner

For the first time, my Plextor PX-W1210S scsi burner has locked.

I can't get the media out.
Using scu, I've tried reset, allow removal and release, no go.

Typical response is something like:

scu: Sense Key = 0x5 = ILLEGAL REQUEST - Illegal request or CDB parameter,

     Sense Code/Qualifier = (0x2c, 0) = Command sequence error

RH 7.3/2.4.21, all updates, Plextor Firmware Revision Level: 1.00 .

Any non-reboot ideas?

Plz answer directly, I'm not currently on this list; my apologies

Kind regards / venlig hilsen,
Mogens Valentin