The two numbers are already in my DNS when I am in wireless mode, but for some reason, last night I couldn’t connect to FR while wireless, using either Safari or Firefox. It was only when I used my ethernet connection that I was able to connect to FR on both Firefox and Safari. When using the ethernet connection, the only two numbers in my Network System Preferences, DNS option are the ones for Time Warner. And when I try to add 208.67.222.222 and 208.67.220.220 under the Time Warner numbers, it erases Time Warner’s numbers, so I had to cancel the option of adding them there.
Strange, today so far (keeping my fingers crossed), it’s working on both ethernet and wireless connections.
You may have needed to go to DOS and flushed the DNS or rebooted the machine to get it to work.
ipconfig /flushdns (assuming PC). My Mac changed right away.