I have my dvd's ripped to an external 500 gig drive connected via USB. Media\nCenter is set to watch for changes on this drive. I can see all of my movies\nin the DVD Library on Media Center, but when I try to play them I get an\nerror saying it can't be played. When these movies are stored locally on my\nC: drive, they play just fine. However, I need to store them on an external\ndrive.\nAny ideas as to what the problem may be???