i have apple tv and i could play my dvd on my macbook pro but now i cannot i get a black and white box i have vlc which apple store put on for me but thats no good because the film keeps jumping. i am wondering why i cannot play from dvd to apple tv

i have had apple tv since last april and i could play films from dvd player from mac book but for some reason this has stopped working from dvd player when i put the dvd player on apple tv i get a black and white screen i can hear the film but i cannot see it, i went to my local store and they but vlc on for me but its terrible the film always jumps every time.

Can anyone now the reason this has happen as i watch film offern but its driving me crazy why i cannot play from macbook pro to dvd player. i have been told it was a sercuity problem with the films so do i use itunes every time i need to watch a film if so then apple tv is a waste of money thanks please help