I just burnt a DVD for a friend of a Torino Concert in 89 and added chapters at each song. But when I jump to a chapter it plays for a few seconds but then starts to judder and stop. It happens at any chapter. It also happens if I fast forward and play. I have made more than one copy, both the same. I have tried burning @ 1x speed, still the same. I have tried the dvd on more than one player both the same. Any ideas?