avatar problems

[Neyvaa]

I've got a problem with my avatar. I can't change it.

I uploaded a new avatar, but it still showed my old one.
I tired to upload it from url, but it still showed the old one.
I deleted the old avatar, but it still showede the old one.
I now uploaded the avatar from another computer, but it still shows my old one.

What should I do?

My old one is pink, and my new one (that never shows up) is similar to my signature.