NPC Physbox

I hope now i not posted it in wrong section. Look like my custom npc physbox work only on 1 bone, because he take damage only when i shooting in middle of him, but ragdoll of this npc work good with all collisions. I don’t know what’s wrong: lua code or my model!
Here is init of npc:

function ENT:Initialize()
	self:SetModel( "models/Tripwire/Killing Floor 2/Patriarch/Patriarch.mdl" )
	self:SetHullType( HULL_MEDIUM )
	self:SetSolid( SOLID_VPHYSICS )
	self:SetMoveType( MOVETYPE_STEP )
	self:CapabilitiesAdd( CAP_MOVE_GROUND )
	self:SetMaxYawSpeed( 700 )
	self:AddRelationship("player D_HT 60")

After 30 minutes of unuseful time spending
I replaced combine with my npc model. On combine collisions work fine…