...Some DVD-videos work some won't.? I have Perfectly working PlayStation 2 and working PC (just a little slow PC)

Please help I've tried PS 2, Hyplay, DivX, MPlayerC, VLC Media Player, Windows Media Player and some others cant remember D: And The DVD IS IN PERFECT STANDING bought it recently about 1 hour ago... Please im asking you WHY WONT THIS PEACE OF SHIT WORK!!???!!!?!??!?! (The movie is James Bond Casino Royale)