Sounds like a DNS issue. DNS translates the IP address of a site into a name, and vice versa.
AH connects directly to the IP of the arena, therefore DNS isn't necessary, but web browsing relies mostly on names.
Try opening up IE and typing in 64.233.167.99 where you would type in the name of a website. This should bring up google.com. If it does you need to verify your DNS settings.