I just bought a DVD writer (Sony DVD RW DW-U14A) and tried to copy a DVD with DVD Shrink. According to PC everything OK, but on the DVD stand alone the movie stops playing at different places. Tried on another DVD stand alone, same problem. Can this be a problem of bad DVD discs (too cheap ?) or can this be due too high compression ? (Movie = Gladiator 149 mins ...) should I try with more expensive discs ? or is there another reason ?