It sounds as if your modem is to slow to handle the java applet that loads up on the page.

Do you have IRC installed on your computer? It's a chat programme that allows you to just connect to the channel you need (in this case My Groovy Wedding). It doesn't need a Java Applet so you shouldn't have the problems with the screens loading. It's really the only other way you can get into it I'm afraid.

If you ever do want to try it out let me know and I'll give you all the details you'll need to log in.
