DVD player will not recognize movie DVD (music CDs are fine)
Suddenly my DVD player will not recognize a video (movie) DVD. About 20-30 seconds after inserting DVD, it is ejected. Music CDs work just fine. I have rechecked all the DVD player preferences and CDs & DVDs preferences and they are the same as on my iMac running same OS and is working well. I'm out of ideas - perhaps the drive is just getting old. But if it is a software problem, it would be nice to fix. Thanks for any ideas.
MacBook Pro, Mac OS X (10.6.8), Superdrive, DVD Player 5.4.2