Windows Movie Maker, Vista

I made a music video for personal viewing by using AoA dvd ripper to get scenes from a movie and importing the files into Windows Movie Maker. My problem is when I publish the video to the computer or DVD and then play it, it's horizontally skewed across top half of the screen (or wmp) and the bottom half is green. :confused It's not like that before I publish it. And I cheked the ntsc and 4:3 aspect ratio. Can anyone please tell me why it's like that and how to fix the problem? Thanks in advance.