I've had problems with BC/ME and it was actually the Sony dvd player that was the issue. I'm having the same problems again on the replacement player--don't you hate Costco sometimes??
Anyway, have you tried the disc on another dvd player or a computer to see if maybe it's not the dvd but the equipment? You may have already tried this so sorry if I'm stating the obvious. Good luck!
Jonahnah
Chocolate IS the answer, regardless of the question.