silly Q: how to upload Avatar ?

when we click edit profile it doesnt give any options to upload an avatar like others have their pics... also just opened gravatar account and uploaded foto there but still its not showing here only default which is on this link http://www.gravatar.com/avatar/72257ab174482bcd8841eace1c02fbc7?s=80&d=identicon&r=g

any tips?

thx