What brand & model is it?

Are you using a dvd+ disk to try to burn with. Double-check that it says dvd+R & not dvd-R. Or can it burn both?

What version of Nero is it? I think you need at least Nero version 6 to burn dvd's. And what's more, Nero might not fully recognise your burner unless you have all the updates for it. Particularly if it's very new model of burner. If you have Nero v.5 then you'd at least need xtra mpeg2 plug-ins to burn video dvd's & probably updates to recognise your burner for burning dvd's.

Another thought, what size disk is it you're using? Is it 4.7 GB or 8.5 GB disk? http://www.answers.com/topic/dvd

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