Problem with windows movie maker

Sorry if this is not the right topic.

I will start from the start. I recorded a video with a VHS video camera. I then converted it to DVD by using a DVD recorder, the I downloaded a DVD to MPG program and converted the DVD to windows media player, then downloaded a few codecs.

So now I can play the video in windows media player. What I want to do is edit it. I can drag it into windows movie maker and when I play it, I can hear it playing, but I can’t see it.

Can you help me, do I need a codec or something?

Thanks,
Mike