Burning Problems: Nero 7.0.1.2; PLEXTOR DVDR PX-760SA

Well, with all the things suggested I found this thread, which seems to suggest you update Nero. An update has been suggested but as far as I can tell, you have not tried. This may not be your exact problem, but the equipment is close.

http://www.cdrinfo.com/forum/tm.asp?m=122364

Many times, even reinstalling the original version will help, but you are very far behind. You could have downloaded a new version by now, even on a modem.