Can not Set Custom Precense State

Hi, Im trying to set device state based on presence state but freepbx does not retrieve the presence state and also can not set dev-state.

Im altering Extensions_custom: [ext-local-custom]

I tried to use this code from Wiki but also did not work:

[ext-local-custom]

exten => 2000,1,Answer()
same =>n,Set(CURRENT_PRESENCE=${PRESENCE_STATE(CustomPresence:Bob,value)})
same => n,GotoIf($[${CURRENT_PRESENCE}=available]?set_unavailable:set_available)
same => n(set_available),Set(PRESENCE_STATE(CustomPresence:Bob)=available,,)
same => n,Goto(finished)
same => n(set_unavailable),Set(PRESENCE_STATE(CustomPresence:Bob)=unavailable,,)
same => n(finished),Playback(queue-thankyou)
same => n,Hangup

exten => 2001,1,GotoIf($[${PRESENCE_STATE(CustomPresence:Bob,value)}!=available]?voicemail)
same => n,Dial(SIP/Bob)
same => n(voicemail)VoiceMail(Bob@default)