Are you doing it through the java version on the web page or through another program like mIRC? If from the link on the page, make sure your firewall allows java script.
Also, eventhough it may sound like a stupid question, but since I know you're on vacation, are you trying to connect on a laptop or on a smartphone?
Ah, no clue as to what might be happening then. My office firewall blocks the IRC page, so I couldn't try right now to see if something is wrong. Might want to post on the Server & Client Support section.
Have a safe trip and see you back soon Cattie. We'll miss you tonight.