Patched NEC 5100A DVD-R burning issue

I flashed my 5100A with patched firmware of 5500A to add DVD-R burn capability.

I tried with different DVD-R media but every time I get the following error:

Sense: 05 ASC: 30 ASCQ: 05 (Command 35)

Px.dll: 4.4.48.500
PxAFS.DLL: 4.4.48.500
pxdrv.dll: 1.2.22.0
PxMas.dll: 4.4.48.500
PxSFS.DLL: 4.4.48.500
PxWave.dll: 4.4.48.500
pxwma.dll: 1.0.0.3

The drive has no problem in burning DVD+R media.

Any help is appreciated.

Thanks