Changed won't work on a Local script? Please help! {Works in Studio but not in PlayMode}

local Event = game.ReplicatedStorage.Events:WaitForChild("AptSettingsUpdate") -- Not important 
local Update = script.Parent.Update

Update.Changed:connect(function(newVal) 
	if newVal == true then 
		Event:FireServer()
	end
end)

Update is a boolvalue that changes it's value once I click on a button. Any Idea of why this is happening?

When I was having this problem it worked to put script.Parent.Update rather than

Update.Changed:connect(function(newVal)

IDK why that worked. why don't you try and tell me if it worked.