Single event content not shown

I tried with a page template (that includes my own single page heading) but I did not hack the code to accept the placeholder shortcodes using the php do_shortcode function as well in other plugins. (they are read as text)
Otherwise I tried to insert the content in the formatting admin area using the [EVENT] placeholder but this is read as text and not as post content

test link is always here: http://www.yogalaila.com/retreats/event1/

Must I create a new ATT where I insert the whole event content description?
The strange is in the event_list page che admin formatting works and the event excerpt placeholder is accepted:

http://www.yogalaila.com/retreats/

Any idea?

I want to set a subtitle for each event that must be specially formatted so I created this custom field ….
I solved the single event content leaving the text in the post normal place but adding a new custom field in the single event formatting (#_ATT{content}) where I placed the full text for the event plus the book now button and shortcodes from accordion plugin and so it is the layout:

http://www.yogalaila.com/retreats/event1/