I haven't changed the firmware, the drive is second hand though so don't know it's history and Lite-on doesn't have list of previous firmware revisions to compare to.
The drive that was in before this one was a Lite-on, slaved to the NEC, it flashed fine with the utility that lite-on uses

Lite-on doesn't have a dos based flasher available for download, they say to contact support in the case that a flash fails and kills your drive to obtain one.
I will try flashing it with it set as single-master, thanks for the suggestions--