What firmware did the NORWOOD MICRO drive come with? If it's a "G" series firmware then you need to crossflash the drive to the official BENQ "B" series firmware. You can crossflash the drive with WinDWFlash or BQFLASHER. Use the cvt files to crossflash.
I haven't done much DL burning but the ones I did I used firmware BSMB & BSOB. I used IMG BURN & DVD DECRYPTER for DL burning.