You have either something blocking that address, either in a firewall setting or ISP issue. Or DNS sn't workign for you.
Trying pinging that Ip address you see there in Kary's screenshot she posted and see if you get better results.
(210.193.49.103)
Edit, or it could be possible that the time you tried to ping it, the server really was down for one reason or another.
Try running the ping again using a -t swittch on the end. That will tell it to ping until you tell it to stop, rather than just 4 times. Or, go to the server status page and make sure the report time for the server matches within seconds of the real time listed. If those two times differe, even by a minute, good chance he server is down.