.Chatted and PlayerAdded?

So I've read and watched many tutorials, and I've tried the ones that fit to what I want to do with my game, which is check if there is an admin, and if the player is an admin, give them access to the commands. I DO NOT understand any of the tutorials given, I've tried all of them, and when I try them, it fails. I make sure that my player name is substituted in the script, I make sure that all the variables are right, but nothing works. I do not understand .Chatted or PlayerAdded, and I need help. If anybody can write something to help me understand how to do something if a player chats a certain phrase, then please do. For example, I want to insert a part into the game when I specifically chat, "Add Part" it just doesn't work. Anyways, here is the script. PLEASE help if you can. Why doesn't this script work?

game.Players.PlayerAdded:connect(function(player)
	if player.Name=="LastTimeLord12" then 
		player.Chatted:connect(function(msg)
			if msg=="Add Part" then 
				m=Insert.new("Message", game.Workspace)
				m.Text="Adding New Part"
				wait(2)
				m:remove()
				wait()
				Insert.new("Part", game.Workspace)
				
			
			end
			
		end)
	end
end)