NEC 6650a problem...any ideas?

I have an NEC 6650a DVD burner in a Dell laptop. It has the 102C firmware, and I just upgraded to Liggy’s 102C firmware hoping it would solve my problem…no such luck, though!

I can burn to a DVD -R (I think) made by Verbatim…but it can’t read it. I tried burning to the same type of disk on my desktop and it works fine. Funny thing is, my desktop can read the DVD burned by the 6650a, but the 6650a can’t read it!

In Windows Explorer if I click on the drive, nothing ever comes up. It reads everything else, though. Anyone have any ideas?