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)