Fireball won't do damage?

I'vebeen trying to create a fireball that damages other players when they come into contact with it. The problem is, that for some reason the damage script doesn't work, and I keep getting the error "Touched isn't a valid member of local script." I've tried moving around where to clone the script in the fireball's code but it just doesn't want to work for some reason. It would really help if someone could tell me how to fix this. Fireball Code:

local variable cooldown = 1
function shoot()
	if cooldown == 1 then 
		print("Works")
		cooldown = 0
	local fireball = Instance.new("Part") --Creates a new Part Called Fireball
	fireball.TopSurface = "Smooth"
	fireball.BottomSurface = "Smooth"
	fireball.BrickColor = BrickColor.new("Really red")
	fireball.Transparency = 0.3
	fireball.Size = Vector3.new(2, 2, 2)
	fireball.CFrame = game.Players.LocalPlayer.Character.Torso.CFrame *CFrame.new(0,0,-5) --Where the Fireball Starts
	fireball.Parent = game.Workspace
	fireball.Anchored = true --Anchors Fireball
	fireball.CanCollide = false
	local damage = script.Damage:clone() --Clones the damage script
	damage.Parent = fireball
	damage.Disabled = false --Enables the damage script
	local mesh = Instance.new("SpecialMesh", fireball) --Adds a mesh to the Fireball
	mesh.MeshType = "Sphere" --Makes the mesh a sphere
	local fire = Instance.new("Fire", fireball) --Adds fire to the fireball
	fire.Heat = 8
	fire.Size = 20
	local bv = Instance.new("BodyVelocity") --creates velocity for the fireball
	bv.maxForce = Vector3.new(math.huge,math.huge,math.huge) --MaxForce is so high almost as to be unlimited
	bv.velocity = game.Players.LocalPlayer.Character.Torso.CFrame.lookVector*80
		for i = 1,13 do
		fireball.Mesh.Scale = fireball.Mesh.Scale +Vector3.new(0.5,0.5,0.5) --Makes the fireball grow
		wait()
	end
	bv.Parent = fireball --Adds the velocity to the fireball
	fireball.Anchored = false
	wait(3)
	cooldown = 1
	fireball:Destroy()
	end
end
script.Parent.Activated:connect(shoot)

And here's the damage code:

local enabled = false

function Damage(hit)
	local h = hit.Parent:FindFirstChild("Humanoid")
	if h and not enabled then
		enabled = true
		for i = 1,20 do
			h.Health = h.Health - 3
			wait(1/15)
		end
	end
	enabled = false
end
script.Parent.Touched:connect(Damage)