help!

i've successfully downloaded movies before and they didn't have this problem. but this one does. it's not completely downloaded yet but when i hit the preview button, i get flashes of the scene and green flashes as well. it's strange. the sound appears to be normal, but the picture is crazy. there are flashes of scenes overlapping previous flashes of scenes with green mixed in (why green?).

it's so confusing, i just want to see a preview of the movie!

thank you in advance!