Why is this script not working? [SOLVED]

I managed to fix it myself, with a lot of help from LordDragonZord. Thanks!

I made a script (in a tool) that will command units to anywhere you click. This is the script:

[P.s: It is a normal script in a Tool.]

local Tool = script.Parent
local Mouse = Tool.Equipped

Tool.Activated:connect(function(part)
	if script.Parent.Selected.Value == nil then
			if part:IsA("Part") then
			if part.Name == "Torso" then
				if part.Parent:FindFirstChild("Zombie") then
					if part.Parent.Owner.Value == script.Parent.Parent.Name then
						script.Parent.Selected.Value = part.Parent
					end
				end
				end
			end
		else
			local PositionP = Instance.new("Part", game.Workspace)
			PositionP.Anchored = true
			PositionP.Name = "UnitWalkTo"
			PositionP.BrickColor = BrickColor.new("Bright red")
			local WalkToVector = PositionP.Position
			PositionP:remove()
			script.Parent.Selected.Zombie.WalkToPoint = WalkToVector
			script.Parent.Selected.Value = nil
	end
end)

Tool.Deactivated:connect(function()
	--lets clean :]
	script.Parent.Selected.Value = nil
end)

Selected is an ObjectValue, Zombie is a Humanoid.

Any help is appreciated, thanks!