Help! I can't locate servers!

I am running CDJ on a small laptop without a modem, so I copied my lib file and took it to work, hoping to do a lookup there. But when I go to options and click on server lookup I get the message "CDDB Server Error. Try a different server. (Could be a problem with your internet connection)." I use all kinds of internet utilities and functions all day long, but this one breaks down--what can I do? I have tried this several different times. I have also looked up the server names on the cddb website and entered them manually, with the same effect.