Can someone please help me with this:

I recently bought a new Nexus S in America and had it shipped to Belgium (where I live and using to phone now). I just can't manage to edit my "me" picture. I tried to do it using my gmail account, so I uploaded a picture for my phone number. I also tried another (older) phone and copied my number into my sim card. When I call myself, I can see the picture that I've uploaded while using my gmail account. But when i send someone a message, the "me" picture is still gray. Also my phone keeps saying that my phone number is "unknown" in settings -> about.

Can some please help me get rid of that gray box?

Thanks!

BTW: I really adore the Nexus S, only this picture has to change!