Lite-on dvd drive problem with dvd -rw

I've a Lite-on 1635 dvd rw drive that claims to record onto any of dvd +/- r/rw but, having bought a stack of 25 dvd -rw discs won't let me record onto them; a window appears saying 'incorrect function'. Dvd -r record and play ok. Any ideas why this is happening? i have seen many posts regarding this drive and other issues.

  moorie- 10:48 21 Feb 07

try installing the latest firmware for your model,this sorted out mine.

  moorie- 10:58 21 Feb 07

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