the knife skins dosent show on the pointshop

hi i have deathrun server with pointshop 1 and this addon of knives : http://steamcommunity.com/sharedfiles/filedetails/?id=506283460
and on the shop its show the model of the knife without the skin, this is the code i use :


ITEM.Name = 'Bayonet : Fade'
ITEM.Price = 30000
ITEM.Model = 'models/weapons/w_csgo_bayonet.mdl'
ITEM.WeaponClass = 'csgo_bayonet_fade'
ITEM.SingleUse = false

function ITEM:OnEquip(ply)
	ply:Give(self.WeaponClass)
	ply:SelectWeapon(self.WeaponClass)
end

function ITEM:OnSell(ply)
	ply:StripWeapon(self.WeaponClass)
end