For some reason I don't understand, sometimes .MOV or .mp4 files won't play in the Sony Vegas 12 editor. When I go to get the clip (which views just fine in either Windows Media Player or Quicktime player), upon importing the media into Vegas I end up with a black green screen instead of video, but the audio is OK. This does not happen on all such files, but some. Today it has really got my goat. WHY? and how do I fix this? Midnight...HELP!!!!