Hmmmm… not sure off hand without seeing it myself. What browser are they using? Do the have java enabled? The box is generated with javascript so if they don’t have it enabled they wont see it. Perhaps their is issues with their java virtual machine. They can download the most recent plugin from http://www.java.com and then give it a try. I have entered the chat rooms with all of the major browsers (with the exception of Saffari since I don’t own a Mac).

What’s your chat page URL? I’ll have a look and see if there is anything out of the ordinary with it.