Okay, I've been experiencing this problem since I changed nameservers.
At home, I can view my webspage
http://www.mupepe.com and everything is fine. At work, I can't view anything related to the site unless it's my ip address/cpanel. if i just put my ip address, i get taken to an error page.
I contacted yahoo, who I bought my domain from. their advice was "i can see it! clear your cache or contact your host."
my hosts advice was "that's a domain issue! contact yahoo!"
so what the hell?