Appointments + not working on single page site

Please take a look at http://www.sophiedoeshair.com

Click appointments, and try to schedule an appointment - the form doesn't show up.

Now try sophiedoeshair.com/appointments

Same page, just not as part of a single page design - and this one works?

Please help, and cc ben@benburnscreative.com with your response.

Thanks!

Sophie and Ben