I'ma noob in the burner arena, so bear with me.
I got a digitalmax 3s163 (lite-on 1633s), and had the same problems others are having with their's. My drive won't recognize CD's (thought to be a lead-out problem with a newer nero version).
A thought occured to me that it happened after I downloaded:
update for windows XP highMAT support in CD writing wizard
What does this do, and could it have any conflicts with NERO?
Thanks for your consideration,