Problem reading dvd-r with WinXP

I have problem reading my dvd-r discs using xp. I created them with Nero 6 on Windows 2000, and they worked fine, but after I upgraded to Windows XP I can’t read them anymore.

I have the newest firmware and driver but it still doesn’t work. I might add that I did nothing but upgrading Windows and then the troubles started. Also, the burner is a NEC ND1300A.

Does any one know the solution to this problem?