Avatar

Hi,
I downloaded and installed the Avatar plugin. It seems to work but I am not able to display blog images.
I uploaded GIF image from back end and it says "Settings saved." but no image is displayed there, when I check my blog, it is showing the default image.
I want the bloggers on my site to have a simple option of uploading their own pictures so that it can be shown on the side of their blogs.

Please help!
Thanks