Help with gun bullet not taking away health?

In a LocalScript in my gun. The only problem is, when a bullet hits something with a humanoid, it does not take any damage at all. I would like for it to do so though.

Player = game.Players.LocalPlayer
Character = Player.Character
Gun = script.Parent
Mouse = Player:GetMouse()

--<< Changeable Values >>--
Gun_Speed = 2000 --The higher, the faster.
Gun_Distance = 7000 --The higher, the longer distance it goes.
TakeAway_Health = 10

Gun.Equipped:connect(function()
	Mouse.Icon = "http://www.roblox.com/asset/?id=43910485"
	local function PullTrigger()
		local Bullet = Instance.new("Part", game.Workspace)
		Bullet.CanCollide = false
		Bullet.Name = Player.Name
		Bullet.Size = Vector3.new(0.3,0.3,0.3)
		Bullet.Shape = "Ball"
		Bullet.BrickColor = BrickColor.new("White")
		Bullet.TopSurface = "Smooth"
		Bullet.BottomSurface = "Smooth"
		
		Bullet.Touched:connect(function(Hit) --PROBLEM IS HERE!
			if Hit.Parent:FindFirstChild("Humanoid") == nil and Hit.Parent.Name == script.Parent.Name then
				for i = 1,100 do
					Hit.Parent.Humanoid.Health = Hit.Parent.Humanoid.Health - TakeAway_Health
				end
			end
		end)
		
		Bullet.CFrame = Gun.Handle.CFrame
		Bullet.CFrame = CFrame.new(Bullet.Position, Mouse.Hit.p)
		Bullet:BreakJoints()
		
		local Power = Instance.new("BodyVelocity", Bullet)
		Power.Velocity = Bullet.CFrame.lookVector * Gun_Speed --Bullet Speed
		Power.MaxForce = Vector3.new(Gun_Distance,Gun_Distance,Gun_Distance) --How long it travels
	end
	Gun.Activated:connect(PullTrigger)
end)

It should be ~= not ==