DVD playing probs

Well I made a copy of X-men, but it doesn’t work in my stand alone DVD player. It says something about being in the wrong area. I can’t figure out why because I ran DVDDecrypter on it to see what region it was it said it played in every region and had no protection whatsoever. So I tried playin it in my computer and voila it worked. I found this rather strange because I backedup another DVD using the same methods and it worked in the same DVD player. I’m using the same media and everything. I’m not sure what to make of it.