uhhhh Avatar help please?

[Samagotchi8]

I want to put a pic as my avatar but it gives me the board message. I have been converting it to different webtypes(or what ever you call them) Ive tryed jpeg, bmp, and pdf. Which one do I need to convert it to?

 

[tamagotchiboy12]

if u have tryed doing that then u cant use it