Several possibilities.Do you even have a DVD burner? CD burners cannot burn DVDs, although it's possible for a DVD burner to burn CDs.
If you're trying to make an audio CD, it's not going to work very well if you're trying to burn a DVD, as I don't think that is possible. If you make a data CD though, a DVD should work fine.
There's also different types of DVDs. There's R/RW+ DVDs, and then there's R/RW- DVDs, and although I'm not completely sure what the difference is, if you use the wrong type, you could end up with some compatibility issues.
If nothing seems amiss, then you may want to try different software. I've had some software work for a burner and other software completely refuse ("Can't detect burner").
Hope this helps
John A
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