Hi anakin3
I have the same drive and I succesfully lightscribe one TDK lightscribe CD and 2 HP lightscribe CDs. I didn't lightscribe any lightscribe dvd. I had only one little problem. I wanted to re-lightscribe one of these CDs and couldn't. I don't know if this is a problem of my drive.
Did you uninstall your
Nero before installing drivers for lightscribe? I read somewhere that I must "erase" all Nero's traces from my computer ... install drivers for lightscribe and then nero.
Or, could be a problem with your drive? I would recomend you to install your drive in another PC then see if the problem persist. Maybe is a faulty drive.