got same problem here.
built a pc for a friend and used a NEC ND3520A as i have one and am very happy with it.
but when i tried to write a dvd movie with clonedvd , which started ok, then stopped and reported a fault, maybe bad media. tried another disc with same error.
have realised when a dvdr is put in drive it seems to recognize disc as a cdr. (under my computer when disc is inserted it then says cd drive, where as on mine it stays as dvd-rw drive)
writes cdr fine.
writes data to a dvdr ok, but still seems to report it as a cd under my computer.
did anyone solve this,
or is the drive faulty?