No appointment emails when Appointments+ integrated with Marketpress

I've successfully implemented a Marketpress store with Paypal Payflow Pro.

I am also using Appointments +. Since adding my scheduling page as a product, once payment complete through Marketpress, no appointment emails are sent to either the client or the admin. The appointment details are added to the system, however.

Site: http://www.naturalenergyhealing.com/shop/products/schedule-an-appointment/