Why wont these functions run on button press?

function poweron()
	if Enabled == false then
		game.Lighting.Aura:Clone().Parent = player.Torso
		player.Humanoid.WalkSpeed = 25
		local light = Instance.new("PointLight")
		light.Parent = player.Torso
		light.Brightness = 15
		light.Color = Color3.new(0, 255, 255)
		light.Range = 8
		Enabled = true
		end
end

function poweroff()
	if Enabled == true then
		player.Torso.light:Destroy()
		player.Torso.Aura:Destroy()
		player.Humanoid.WalkSpeed = 16
	end
end

function shoot()
	if Enabled == true then
		local d = player.Torso
		local newblast = blast:Clone()
		newblast.CFrame = tool.Parent.Torso.CFrame + (handle.Position - tool.Parent.Torso.Position).Unit * (handle.Position - tool.Parent.Torso.Position).Magnitude
			newblast.Velocity = (d.CFrame.lookVector * 180) + Vector3.new(math.random(-20, 20), 0, math.random(-20, 20))
			newblast.Touched:connect(BlastHit)
			newblast.Parent = game:GetService("Workspace")
			newblast.Blast:Play()
				
	end
end

function BlastHit(Part)
	if Part ~= nil and Part.Parent ~= nil and Part.Parent:FindFirstChild("Humanoid") ~= nil and Part.Parent ~= tool.Parent then
		Part.Parent.Humanoid:TakeDamage(37)
		Part.Parent.Humanoid.Jump = true
		wait(0.1)
		if tool.Parent:FindFirstChild("Torso") ~= nil then
			Part.Velocity = Part.Velocity + (tool.Parent.Torso.Position - Part.Position).Unit * 150
			tool.Parent.Torso.Velocity = (Part.Position - tool.Parent.Torso.Position).Unit * 200
		else
			Part.Velocity = Part.Velocity - Part.CFrame.lookVector * 120
		end
	end
end

function CheckKey(Key)
	if string.lower(Key) == "q" then
		poweron()
	elseif string.lower(Key) == "e" then
		poweroff()
	elseif string.lower(Key) == "f" then
		shoot(true)
	end
end

function ToolEquipped(Mouse)
	if Mouse == nil then
		return
	end
	Mouse.KeyDown:connect(CheckKey)
end
tool.Equipped:connect(ToolEquipped)

I started making a new tool earlier and this is part of this script I used. When I enter the game and press the button I assigned, it doesn't work....