I had your calendar installed on a new site with a generic theme. It worked fine. Once I installed a new theme (wpthemegenerator) things did not work well. The back end is fine however the front-end doesn't show the scheduled appointments. My guess is there is a js conflicts. Also when logged in the calendar shows up twice. ULR is mowermedicmd.com if someone could take a look...
Love it when it worked!