How do I change a participant's booking to a new event from the backend administrator area? When I'm on the Edit / Create Booking page there are no events listed from the drop down menu for which to choose another event. Also, while in the backend, when I want to create a new booking there are no choices under the drop down menu to choose an event. What function am I missing in order to perform these tasks ?

Also, when I unpublished a booking on the Booking Page backend I received this fatal error.
Fatal error: Call to a member function publish() on a non-object in /home/content/n/w/s/nwsail/html/Joomla25/libraries/joomla/application/component/controlleradmin.php on line 190

Thanks, Bill