That depends on exactly what message you get with each connect attempt. The solution to the message I posted above is entirely different from your inability to resolve the server at all.
Post a few of the servers you're trying, and copy the message you get when attempting to connect to them. Or connect to irc.byxnet.net and join #acf and we can discuss it in real time. If you can't connect to irc.byxnet.net, post that message here too. I'll check here every few minutes, and I'm on byxnet.