I Need Avatar Help Please!

[Mimi2six]

Could someone please help me? I have been trying to attach an avatar and I can't get it to work. I have tried attaching it with the browser button and downloading the image from my computer. I've tried pasting the url from my image in Photobucket. I have also tried pasting the img address in Photobucket. I keep getting that it is an invalid file. I don't know what else or how else to do it. Does anyone have any suggestions? I feel naked, no blinkies or avatars

Make sure it's the correct size. Other than that, I'm not sure.