It's a problem with jch - it unloads mootools and combines it with some of the other scripts on your page then loads it. The problem is that it loads mootools after the carousel script is initialised which involves calling some mootools functions which haven't yet been defined.
You will find that the Rok Ajax search plugin doesn't work either for the same reason.
I suggest contact the authors of jch and pointing out the problem, it is probably something that they could fix by ensuring that mootools is loaded before other scripts.
But it also looks quite buggy, it doesn't seem to notice the existence of the scrollpane script or the ajax search one, so that are still being added separately. I would suggest not using jch, because it doesn't really seem to accomplish what it is designed to do, and causes problems for your site.
