I just had to reinstall my linuxmce server... A OS failure disk...
But no prob, i've got a backup.
I just restored all data, and put the databases back in place.
But to my surprise, the 'respond to events' are empty when you look in the admin page. All other settings seem to be corect.
When I check the database itself, I see that the the table 'pluto_main'-'Eventhandler' contains all my created events.
Any hints what I've forgot/did wrong?