Filtering Enabled is broken?

I don't understand this crap. I've literally copy and pasted examples from ROBLOX Wiki pages on Filtering Enabled and nothing I do works.

I have a Script in workspace and a Local script in StarterPlayerScripts. I pasted the code on wiki just like it told me to but NOTHING, NOTHING AT ALL! It's driving me nuts, Im testing this in studio with the Server Test option (Once again just as the Wiki said) but still nothing.

It seems to work fine on the normal studio testing mode but not on the server one. Please help me..this is beginning to turn my hair white.

-- This is inside a LocalScript. (COPIED FROM WIKI)
-- Place it anywhere a LocalScript can go (for example, under StarterPlayer.StarterPlayerScripts)
game.Players.LocalPlayer:WaitForChild("MyClientEvent").OnClientEvent:connect(function()
	print("EventHappened")
end)

-- Inside Server Script (ALSO FROM WIKI)
game.Players.PlayerAdded:connect(function(player)
	local event = Instance.new("RemoteEvent")
	event.Parent = player
	event.Name = "MyClientEvent"
    wait(5)
	event:FireClient(player)
end)

This is just one of the methods I've tried but none of them worked. Is it my fault?