Internet Explorer doesn't get there either. Where is is suppose to go? A Whois check shows that the domain name is good and not expired, but the primary and secondary domain names are pointed to a Yahoo server. Is that where you want them pointed?
Domain servers in listed order:
yns1.yahoo.com
yns2.yahoo.com
While Yahoo.com exists, "yns1" and "yns2" do not show up as a domain name server directly, and their answer rate is kind of slow. A traceroute is also very slow. The problem may be on their end. They could be overloaded and just not responding in enough time.