Favicon disappears

Hi i have an error with the favicon now sice 5 days i sended various messages to the support zocku but i don't get an answer about this till now!

From one moment to other my icon was away, but in the admin center i can see it, but not delete it or add another. there's no way to delete add or see it in the browser anyone can help please? urgent.

http://theworldofblackmen.zocku.com
I'm using vista home and firefox 3.0.11