AIM wallpaper

Does anybody know a way to change the wallpaper that others see when I chat with them? I set mine a few years back when I used AOL, but I no longer use their service and apparently others still see my old wallpaper when I use either Mac AIM, Adium, or iChat.

its actually stored on the aol server, you can either sign back into aol (you still have the acount correct?) or there might be an option on the webpage to change this option, i am not sure.