Kitt Waverider

I've tried resetting the router and restarting my computer, flushing the DNS cache and everything else, I've even reinstalled fresh versions of Second Life and FireStorm but it keeps saying the same thing: DNS could not resolve the host name. Please verify that you can connect to secondlife.com web site. If you can, but continue to receive this error, please go to the support section and report this problem. I even tried to go to secondlife.com like someone said and came back to see if it worked, it didn't. Is there something I'm doing wrong?