what did you make the avatar in? some programs like MS paint don't support animated gifs
opening it up in gimp shows me you only have 1 frame in that avatar, and unless the forum update a little while ago broke animated gifs you might have saved wrong
or copied wrong if it isn't your creation
I believe it was the program I was using(Easy GIF animator 5). This GIF would play, however it wouldn't save right. I'm going to download GIMP and give that a try soon, but I really just don't feel like messing with it anymore.
Edit: Everyone seems to think GIMP is simpler to use anyway according to a google search, so I will definitely give it another try with GIMP soon.