Don't have Java
or is it blocked from loading via a script blocker or firewall/router? It won't load.
Port 6667/IRC filtered via a firewall/router? It won't load.
Though the chat system hasn't been updated in ages it should run fine without any type of maintenance on my side, I just went there and it loaded and connected without any issues; do you get an error? If so then I wouldn't have any problem in upgrading the darned thing, but only if there is a reason to do so.