I am also having the same problem with mine. I can download any mpg one's that I find and they work ok but when it comes to avi's I can't. I've been to my help section and my computer DOES support avi's.....but I don't think it supports the codec the file uses. Now here's the thing I've downloaded DivX DVD decrypter and XVid but it still continues to not be able to play. DO you have to activate it or something. Also how do you find out what kind of codec a file is using? Really still dumb with computers and I don't know what to do? I've seen LORD OF THE RINGS post on sites with downloadable codecs any idea on which one's I should try? Thks in advance. Peace to you all