CustomPress Custom Fields suddenly stopped working on front-end.

I have used a custom fields to display event information, and although it worked perfectly for long some time, it just recently it has stopped working. Nothing has been changed that I am aware of (front end or back end).

What is really puzzling me is that some of the results display fine, and as usual (such as the event title, date, description). However custom fields such as the door time and type of ticket are simply not displaying.

Things I have tried to no avail:

• I’ve disabled all plugins except CustomPress

• I’ve tried creating a brand new custom field and echo’ing the results

• spent countless hours re-writing the code, trying even to simply echo a custom field

WordPress: v 3.9.1

CustomPress: v 1.3.5.7

Any help is greatly appreciated.