The example that you sent is for EventView control,
I have no problem with EventView control,
I have issue with EventShedule control (contains RadSheduler) ,
In EventSheduler control there is mssing QueryString "Events=EventItem" that's why it is not going to proper EventDetails page in Sitefinity 3.5 SP1.
I was able to add hyperlink on Event heading by <AppointmentTemplate> tag but it's not opeing proper detail page.