Ajax Event Calendar

I am using the Ajax Event Calendar plugin Ver. 1.0.2(Ajax Event Calendar) along with S2Member plugin Ver. 120608.
For some strange reason the S2Member plugin doesn’t allow to non registered users to view created events via the Ajax Event Calendar.
The plugin itself doesn’t impose some sort of security in order to stop(or allow) per user role viewing of events.
It uses just 3 capabilities that have to do with creating events and managing the calendar.

Please see here a site that has Ajax Event Calendar installed where non registered users can view the events,
Site without S2Member showing Calendar with Events to Non Registered Users and here
Site with S2Member and Ajax Event Calendar where Events don’t show up for Non Registered Users.

Please advice. Thank you.