Distorted video playback

[baker]

I am trying to set up an experiment that includes a video presentation but when Medialab plays the AVI file it appears distorted (horizontally stretched) and in the top left corner of the screen. I can't seem to perform any adjustments using the numbers in the parameters. Is there a way that I can have the video centered on the screen and in the proper aspect ratio?
Incidentally, it plays fine in Windows Media Player.

Thank you in advance for your help.

Edit: I have found a workaround. After converting the video to .wmv format it plays fine (no distortion) and parameters adjust the screen positioning properly.