[Avatars] Gavatar , My avatar did not change in wpmudev.

Dear all,
I am a new member and I am really happy to choose your services and I think I will continue with you.
Just one question, not important but it is working on my nerve
It's about: Gavatar, My avatar did not change in wpmudev.
actually, my email in Gravatar is the same as here.

Thanks in advance.