DVD Player, Front Row and VLC wont play DVD's!!!

[ryan.stewie]

This has only started happening today, I want to watch a DVD on my iMac, and DVD Player wont play it. I've tried different DVDs and I've also tried playing the movies from Video_TS folders on my HDD, still, it wont play. DVD Player will play a few seconds, then the video and audio will stop and freeze. If I try to click stop, or anything else i get a "Not Permitted" bubble appear, and if I click Pause I get a message "DVD Player has encountered a system error. Error -69889"

I've tried totally removing DVD Player, its plist's, and folders and restoring a old versions from Time Machine. Still, nothing works. This also happens in Front Row.UPADTE: I fixed VLC by reinstalling it. But DVD Player and Front Row still dont function.

Please help. Heres the link to a short video screencast that shows exactly what happens:http://j0wkcw.blu.livefilestore.com...UONmFSLKWhp-5vxs2QICjyH/capture1.mov?download

 

[BlueRevolution]

What about software DVDs? Do those work?

 

[ryan.stewie]

Everything except DVDs and VIDEO_TS folders works. Its not the drive or the disks, because VIDEO_TS folders on my hard-drive dont play either. I should also say, most DVDs are affected and wont play, but some do.