DVD-Writer freezing

My dvd writer (Nec 3500 iirc 16x dual layer jobby) freezes when i burn dvds. It happens somewhere in the middle, not at a specific time during burn process. If i reboot and burn the same compilation again - it completes fine, but if i then try a second burn afterwards - it fails. Nero just stops (and the done and "x" buttons are greyed out). The drive stops responding to anything either. I can't eject it until i reboot. I can close nero through task panel, but thats about it. Does anyone have any ideas or similar experiences?