Never had a problem playing a dvd before, but I just purchased on ebay a copy of elo zoom live tour (NTSC Mpeg-2 DVD-5). Plays fine in my Apex 1100w standalone dvd player, but when I put in it the computer drive, reading light stays on for about a minute, then nothing. Drive, Dvdshrink, and PowerDVD says no disc. Is this a form of new or not so new copy protection that I have encountered? Any suggestions? Thanks.