I have a MacBook Pro, and it will play pretty much any DVD with Front Row. Recently I bought a set of workout DVDs, all made by the same company. The first one plays both on my laptop and in a DVD player just fine, but the other two will only play on DVD players. When I put them in my laptop, they don't play and end up crashing Front Row, VLC, and any other software I've tried. I've also tried ripping them and playing the file, but the same thing happens. I travel a lot, so it's really important that I am able to play these on my laptop, plus this is just bothering me! What is going on? Please help!