Hi!
I'm sorry you're having trouble with the JAVA client. While it's still the best one we know of that can be used via the website I usually recommend people get an irc client program like Chatzilla or IceChat if they are going to be regular users of the chat rooms. There are a lot of irc clients available and many of them are free. When I started going to the chat rooms I used Chatzilla (from Mozilla). mIRC is free for thirty days and then begs for $20 every time you open it but it's a decent client for Windows. That's the one I use.
There are a number of Apple and Linux clients as well but I don't know much about them.
hugs & smiles,
HelenW