help with wings code

[soosy]

so i have thise wings that i want t add on the pointshop and for some reason the wings dosent show on the shop

code :

ITEM.Price = 15000
ITEM.Model = 'models/wings/wings_folded.mdl'
ITEM.Bone = 'ValveBiped.Bip01_Spine4'


function ITEM:OnEquip(ply, modifications)
ply:PS_AddClientsideModel(self.ID)

end

function ITEM:OnHolster(ply)
ply:PS_RemoveClientsideModel(self.ID)

end

function ITEM:ModifyClientsideModel(ply, model, pos, ang)
	model:SetModelScale(0.8, 0)
        pos = pos + (ang:Forward() * -37.749) + (ang:Right() * 5.111) + (ang:Up() * 1.722)
        ang:RotateAroundAxis(ang:Right(), -3.921)
        ang:RotateAroundAxis(ang:Forward(), 83.024)
        ang:RotateAroundAxis(ang:Up(), 92.373)

        return model, pos, ang

end

addon : [url]http://steamcommunity.com/sharedfiles/filedetails/?id=107165776[/url]