If I play a dvd file from my hard drive, all is well. If I play the same file from a DVD in my DVD drive, the video is slow and jerky. The sound echoes like in a tin can, too. I've tried Realplayer, Winamp, Windows Media Player and Nero with the same degraded results. I'm runnung XP w/SP2, 1024 memory with a 2 gig cpu. Also have a good 256 pcie video card that has no problem playing DOOM3 with all the bells and whistles turned on. Any ideas? I need help-please!