Make sure there is an fop2 user in manager_custom.conf - it should look something like this:
[fop2]
secret=somepassWord
deny=0.0.0.0/0.0.0.0
permit=127.0.0.1/255.255.255.0
read=all
write=all
writetimeout=1000
eventfilter=!Event: RTCP*
eventfilter=!Event: VarSet
eventfilter=!Event: Cdr
eventfilter=!Event: AGIExec
eventfilter=!Event: ExtensionStatus
eventfilter=!Event: ChannelUpdate
eventfilter=!Event: ChallengeSent
eventfilter=!Event: SuccessfulAuth
eventfilter=!Event: HangupRequest
eventfilter=!Event: SoftHangupRequest
eventfilter=!Event: MusicOnHold
eventfilter=!Event: LocalBridge
