Should I be able to edit a windows media file? I have some wma files with combined audio and video (free files downloaded off the web). I tried editing them in MS. The audio plays back fine. The video however played back very very jerky - it updated once every couple of seconds. I am talking about the playback in the pre-view window.

The files play back perfectly in the windows media player - and Real player.

I have MS3.0. Are wma files an unsupported format?
thanks
IW