PvPzone in zone manager not working. what is problem?

Hello guys

 
I installed the following plugins:
https://umod.org/plugins/true-pve
https://umod.org/plugins/zone-manager

And after used these:
Console Commands:
server.pve true
Chat Commands:
/zone_add
/zone radius 120
/zone name PvPzone
/zone enter_message "This is a PvP zone"
/zone pvpgod true
/zone ejectsleepers true
/zone enabled true

Everything is Ok and no problem but we cannot harm each other when we enter the area. no damage, PvP zone not work.
What is problem?
Do I need to install another plugin to activate PvP mode? or do I have to set a command code?

Use TruePVE and ZoneManagerAutoZone, the zone for airfield might be lowered from 200 to 180 to keep from at the walls. And make sure your "server.pve false"

server.pve true  needs to be false if using truePVE