Trying to change the decal ID while playing?

This script just places the number id inside the decal but the decal is not shown, any help?

function event.OnServerInvoke(player,id,color)
	local prefix ="rbxassetid://"
	local color = BrickColor.new(color)
	local image = (prefix..id)
	local parts = workspace.Banners:GetChildren()
	if color then
	for i,v in pairs(parts) do
		if v.Name == "Cloth" then
			v.BrickColor = color
		elseif v.Name == "Crest" then
			v.Decal.Texture = id
		end
	end
	else return "Invalid Color!"
	end
	return "Banner set!"
end