DVD Player - Some DVDs Work, Others Don't

Archived from groups: microsoft.public.windowsxp.video (More info?)

I just recently started having this problem. My DVD/CD-RW
has always worked fine. But now, although I can read and
write CDs and some DVDs work fine, other DVDs are not
recognized at all. Meaning when I click on the drive -
Windows XP responds by saying there is no disk in the
drive. Is this a decoder problem? A hardware problem? I
already tried cleaning the drive.

thanks