Help With Non-Team Killing Script?

Player = game.Players.LocalPlayer
Gun = script.Parent
FireSound = Gun.ShootSound
LoadSound = Gun.ReloadSound
mouse = Player:GetMouse()
enabled = true
Gun.Ammo.Value = 5
MaxAmmo = 5
function e()
    script.Parent.CanReload.Value = true
end

function u()
    script.Parent.CanReload.Value = false
end

function Shoot()
    function Damage(Part)
        local Humanoid = Part.Parent:FindFirstChild("Humanoid")
        if Humanoid ~= nil and Humanoid.Parent.Name ~= Player.Name then
            for i,d in pairs(game.Players:GetChildren()) do
                if d.Name ~= Humanoid.Parent.Name then
                    Humanoid:TakeDamage(5)
                end
                if d.Name == Humanoid.Parent.Name then
                    if d.TeamColor ~= Player.TeamColor then
                        Humanoid:TakeDamage(5)
                    end
                end
            end
        end 
    end
    if Gun.Ammo.Value > 0 and enabled == true then
        Gun.Ammo.Value = Gun.Ammo.Value - 1
        enabled = false
        Bullet = Instance.new("Part", game.Workspace)
        Gun.GripForward = Vector3.new(-0.975, -0.223, -0.02)
        game.Debris:AddItem(Bullet, 2)
        Bullet.Shape = "Ball"
        Bullet.Size = Vector3.new(0.2,0.2,0.2)
        Bullet.TopSurface = "Smooth"
        Bullet.BottomSurface = "Smooth"
        Bullet.Transparency = 1
        Bullet.BrickColor = BrickColor.new("Dark stone grey")
        Bullet.CanCollide = false
        Bullet.CFrame = Gun.Handle.CFrame
        Bullet.CFrame = CFrame.new(Bullet.Position,mouse.Hit.p)
        v = Instance.new("BodyVelocity", Bullet)
        v.velocity = Bullet.CFrame.lookVector *900
        v.maxForce = Vector3.new(math.huge, math.huge, math.huge)
        FireSound:Play()
        Shell = Instance.new("Part", game.Workspace)
            Shell.TopSurface = "Smooth"
            Shell.BottomSurface = "Smooth"
            Shell.Size = Vector3.new(.1,.1,.1)
            game.Debris:AddItem(Shell, 0.8)
            Shell.CFrame = Gun.Handle.CFrame *CFrame.new(0, -.5, -.3)
        Bullet.Touched:connect(Damage)
        Light = Instance.new("PointLight", Gun)
        wait(.1)
        Light:Destroy()
        Gun.GripForward = Vector3.new(-0.975, 0, -0.02)
        wait()
        enabled = true

    end
end

function Reload(key)
    key = key:lower()
    if key == 'r' then
        if enabled == true and Gun.Ammo.Value < MaxAmmo and script.Parent.CanReload.Value == true then
            LoadSound:Play()
            wait(LoadSound.TimeLength)
            Gun.Ammo.Value = MaxAmmo
        end
    end
end


script.Parent.Equipped:connect(e)
script.Parent.Unequipped:connect(u)
mouse.KeyDown:connect(Reload)
Gun.Activated:connect(Shoot)

That's a script to a gun that I made, look towards the topish for a function called "Damage". Damage tells the bullet to only do damage to a humanoid if either 1) No player has the same name as the Humanoid 2) The humanoid has a matching player that is the same team as the player using the gun

The problem is that this doesn't work, I can still kill teammates. Am I doing something wrong, am I doing it the wrong way, is there a better way for a non-teamkilling script? Please help.