Freecom CD/DVD Drive/Writer no longer recognised

I don't seem to be getting very far with Freecom's support so I thought I'd ask here. Since upgrading to OS 10.5.6 discs inserted into my external reader/writer are no longer mounting.

Has anybody found a solution for this?

If I open up Disk Utility and System Profiler it shows:

Disk Description : FREECOM_ DVD+/-RW20J5 Capabilities : Click for more information
Connection Bus : USB
Connection Type : External
Burn Support : Unsupported

Firmware Revision: QF51
Interconnect: USB
Burn Support: Yes (Generic Drive Support)
Profile Path: None
Cache: 2048 KB
Reads DVD: Yes
CD-Write: -R, -RW
DVD-Write: -R, -R DL, -RAM, -RW, +R, +R DL, +RW
Write Strategies: CD-TAO, CD-SAO, CD-Raw, DVD-DAO
Media: To show the available burn speeds, insert a disc and choose View > Refresh