You suck at the internet.
You need 100 posts + a day on top of that to get avatar privilleges. Therefore, you don't have sufficient privilleges.
Geocities has very little bandwidth. 20 hits on their pages (if that) and your site is dead. Host on imageshack.us or photobucket.com
You probably dissabled pm's in your Control Panel, and therefore can't Pm the admins. Even if you can't do it for whatever reason, they have site feedback/tech support subforum which mods and admins frequent all the time...
so... it's all user error, their forum rules.