Sony DVD-RW DRU-710A will not burn onto DVDs, only CDs.

I have a Sony DVD-RW DRU-710A that will not burn files onto any format of DVD (-R,+R,-RW,+RW), but only onto CDs. I have been using Nero 6 successfully with CDs. But when I try DVDs, at the start of the burning prompt, the program informs me that it cannot proceed because I have to use a CD, not a DVD. How can I solve this?

ae you using the full nero burning rom or Nero express? if it is Express then make sure that in the drop down menu for recorders that the burner listed is for DVD not CDRW. as I recall nero express in version 6 always had two listings for the same burner one for DVD and one for CDRW.