Module script function fires when the place starts?

I have the module script:

local module = {}

function module.StartUp(blox)
	local gui = blox.Screen.StartUp
	local rotate = gui.Frame.ImageLabel
	local y = 1 
	local on = false
	local button = blox.onoff
	
	if on == false then
		on = true
		button.Material = Enum.Material.Neon
		gui.Enabled = true
		wait(2)
		rotate.Visible = true
		y = 1
		rotate.Rotation = 0
			while y < 1000 do
				y = y + 1
				rotate.Rotation = y
				if on == false then
					break
				end
				wait(.01)
			end
	else
		button.Material = Enum.Material.SmoothPlastic
		on = false
		gui.Enabled = false
		rotate.Visible = false
	end
end

return module

The startup function is supposed to trigger when the button that parents the following script is clicked:

local click = script.Parent.ClickDetector
module = require(script.Parent.Parent.functions)

click.MouseClick:connect(module.StartUp(script.Parent.Parent))

But it just runs when the game starts, why and what can I do about that?