DVD verification doesn't work

vbimport

#1

I have problems with my TEAC DV-W516GA DVD writer verifying DVDs with nero.
Altough it verifies correctly CDs, on DVDs it reads nothing from the disc, not even lights up the led on the unit. The progress bar shows the verification process, but it reads only from the HDD. At the end, of course it finds everithing wrong.
Any suggestions?