The Next Month button on the Make An Appointment page is not working

The Next Month button on the Make An Appointment page is not working. When you click on it, the page just scrolls up, it does not switch months. I have tried de-activating all plugins and just leaving Appointments+ active, but that doesn't do anything.

I have authenticated WPMU via the plugin to log in to my site.

Please help!

http://matt.launchgocreative.com/make-an-appointment/