Hmm, I always get that. What you are probably going to have to do is something so weird, but it always helps me. Basically, you clear the room up and trick the server so that it's empty. Ill give you step by step what to do.
1)You will need to get to another website with another chat service. I have found one that works great. So go to
http://www.sm128c.com/chat.html.
2)It will have a popup to install something. Click yes.
3)The Java applet will open with all sorts of Junk.
Nickname: dshjshks(haha)
Channel: #room2061
RealName: dk3.com
Server Name: irc.dk3.com
Server Port: Whatever the number is, just leave it
CONNECT NOW!
4)It will say some stuff. Just type anything like "yay" or something.
5)It will say that you arent on a channel. Type in "/join #room2061" and press enter.
6)It will bring up all sorts of crud. Now go back to my chat room page
7)Try logging in again and see if it works.
Hope that helps!
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Mario likes to dance in his backwards pants! Yay!