"Next Month" button not working properly

I have just recently uploaded Appointments + and all seems well except for the "Next Month" button not working. You can view my appointment page at:

http://rockyourmarriage.org/wordpress/make-an-appointment/

Whenever I click on the "Next Month" button it doesn't change the schedule at all from the current month, but instead just scrolls down the page a bit. Can you fix this or tell me what I need to do to get this working?

Thank you,

Jordan Hall