Java/Chat issue

[JustBeingMe]

Using windows 7 latest versions of IE, Safari, Google chrome, chat cannot be accessed by using the Chat Room link next to Log Out. It gives the following message :
The website encountered an error while retrieving http://www.butchfemmeplanet.com/addonchat.php?do=popup&. It may be down for maintenance or configured incorrectly.
Here are some suggestions:
Reload this webpage later.
HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfill the request.
(I already sent you an email with screen shots) I get this message only on the Main Page if I directly click onto chat on top right next to Log Out.

I have to use a different way to get into chat either by
1. clicking on New Posts and then clicking the chat room next to log out,
2. clicking on Chat under Site Navigation or
3.clicking on chat under the Reunion Info. on far right.


Also, to get the window to float after chat room opens, I have to click on the tab left of the question mark at the bottom of chat if I enter chat via site Navigation.
If I enter chat by going through New Posts, the chat automatically floats the window.

Thanks for your help ALL MIGHTY GURU LINUS.