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.

Why dont you just make it so, when the bullet hits the person, and they have a humanoid, and their teamcolor ~= the player who shot the bullets teamcolor, then it wouldnt take anything off.