Hi, Same thing happened to me. If you have been using Firefox that's the issue. It no longer supports Java platforms, so I downloaded Google Chrome which is free, and voila, it gets me into 50+ chat. Hope this is your problem, it's an easy fix.
Hopefully this will post on the front of the page everyone should go to google chrome instead of using Mozilla Fire Fox because it no longer supports Java Script. So if you want to get on go to google.com and download their version of Google Chrome! Otherwise you will not be able to chat in the room.