Brx,
I split your post off from the topic you had posted in. Please try to start a new thread in the future unless your issue is directly related to the rest of the thread you are posting in. It helps us keep things tidier around here
As for your issue, the page you linked to doesn't seem to have JFBConnect currently enabled. However, if that's the page with the issue, the problem is that that page is using the very, very, very old method for loading the Facebook Fan Box widget. The Javascript your loading is from over 3 years ago and has been deprecated and no longer maintained by Facebook. If that code is being used on the same page as JFBConnect, it would cause JFBConnect to fail as the old library conflicts with the newer Facebook code.
So, you'll need to disable the old Fan module you're using to use JFBConnect. Facebook has the JFBCFan module you can use as a replacement, so you shouldn't loose any functionality.
Hope that helps, but if not, let us know!
Thanks,
Alex