You most probably have incorrect permissions for the manager user (/etc/asterisk/manager.conf), preventing UserEvents from being fired (or something to that effect). I cannot tell you for sure. You can remove all the fop2states entries by hand:
asterisk -rx "database deltree fop2state"
And if you can, try to create a special user for fop2 like this:
http://www.fop2.com/blog/make-fop2-snap ... ventfilter
Best regards,
