Hello all, I have a Toshiba SD-3750. It's a great unit and hasn't given me any trouble until I bought the OSU National Champions DVD. It plays the video, but doesn't play any sound. All other DVD's appear to play just fine. The one thing that I noticed is that when the OSU DVD is in the DVD player the code M-2 is displayed on the DVD screen. I have no idea what the problem is. I have looked online and in the manual to no avail. Any ideas?