chatbox not working

The chatbox in my forum isn't working ,it appears in the index and the portal but it doesn't load.
and this is my forum to check it out
http://emadmetaeb.fr-bb.com

Hello and welcome to Editboard FOF.

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for you chatbox, i just checked it and i didn't encounter any problem!! Do you have activate the Javascript?

Thanks very much

you mean that it's working on my forum?!
but isn't working with me and what's "activate javascript"
please tell me how to make it and thanks for your concern