What model of camcorder is your video coming from?
Also, I am not sure what you mean when you say "The screen on the left." Are you using Premiere Elements or Premiere Pro?
My videos are already on my pc and it worked for a long time.
i mean the "promoview" that is usually on the left side.
We will need to know more information about your video. Where did it come from?
Can you open your video in the program G Spot and list it's format, resolution, frame rate and video codec?