Howard I am having the same problems and I just verified via the Java website I have the lastest version. Firefox for me is version 13.1. I checked my add-ons only to find java there as well.. when I click chat I get an empty page with no chat.
I was fine when I had firefox 7.0 I made a huge leap to upgrade to 12.o and after that no chat feature.. At one point I was told I needed to install java back, I did that and verified evrything was fine and up to date.. I am mystified what to do next.. thanks so much
All I can say is try a different browser. Try Chrome or IE. Perhaps you have an addon that is preventing it. I can't do anything for the chat, it's just a service that I pay for.