I'm trying to edit and put togeather a video in adobe premier. When I click on a source file to play the video, it runs ok audio, but the video only displays one frame every five or six seconds. The video is shot in HD if that matters, but the computer I'm using has 4GB of ram, and in the task manager, premier only takes up two, ruling out hardware problems. The video plays fine anywhere else, even in windows movie maker. Is there any way to fix this??