file problem or codec problem?

I am having a problem with a movie i recently downloaded and I am wondering whether it is the file itself or if I need to download another codec. When I play the file, most of the scene is green blocks. I do get sound, and the video changes, just not clear picture. I have downloaded divx and xvid, and i’ve tried the video toolbox, but i’m not sure if I need to do anything special to change the way the video plays once I’ve downloaded them. I would appreciate any ideas/help.
Thanks a buch,
manufan02

What happens when you try playing it in VLC (www.videolan.org)?

It works perfectly. Thank you so much, that was awesome!

Thanks again.

I actually have the same problem.. Only that I can’t see the picture at all. But I can hear the sound.. So I’ll try the VLC too.. Hope it works!