Mackaycc - What version of Media player are you suing, I am using Version 9 with the Microsoft Codec download and get no problems with AVI files. I also have Divx and have not found a AVI file it would not play.
How big is the clip, if it is not that big and you have broadband, I am more than happy to receive by Email and see if I can get it work. That is of course if the clip is not a private home video clip.
Let me know.