Why script still working even if i disabled it by command in the same script?

Hello, So title is weird, but i'll try to explain it. I want to make script disabled after 5 parts dropped. Basically script works, because it makes script disabled, but parts still falling. Anyway it's dropper script from my tycoon. I want to make parts drop again after mouse click on the Fix Part. Probably i messed up something.

Here is script:

wait(2)
workspace:WaitForChild("PartStorage")
local count = 0
local FixPart = script.Parent.Fix

while wait(2.5) do
	count = count + 1
	if count % 5 == 0 then
		script.Disabled = true
		FixPart.ClickDetector.MaxActivationDistance = 22
		FixPart.Sign1.Enabled = true
		FixPart.Sign2.Enabled = true
		function onClicked (Part)
			FixPart.ClickDetector.MaxActivationDistance = 0
			FixPart.Sign1.Enabled = false
			FixPart.Sign2.Enabled = false
			script.Disabled = false
		end
		FixPart.ClickDetector.MouseClick:connect(onClicked)
	else
		local part = Instance.new("Part")
		part.Parent = game.Workspace.PartStorage
		local cash = Instance.new("IntValue",part)
		cash.Name = "Cash"
		cash.Value = 5
		part.CFrame = script.Parent.Drop.CFrame - Vector3.new(0,1,0)
		part.Size = Vector3.new(1, 1, 1)
		part.Rotation = Vector3.new(-0,-0,0)
		part.TopSurface = "Smooth"
		game.Debris:AddItem(part,20)
	end
end