Event plus front end editor page not found error

I'm using
WP 3.4
BP 1.5.5
I'm having lots of problems with Events+ plugin.
But Support guys seem to be busy.
Anyway, I'm having a new issue with Event+ . Earlier The front-end editor worked well. Now the front-end page simply does not display. It says:
Permission Denied
Not Found / No Access.
Please check: http://mycraftdecor.com/plainbuddy1/events/add-event/