TeleportService not working correctly?

I have this script to get rid of the teleport UI. Any idea how to do it? This script isn't working. Also how would I make it so it loads a custom Gui instead of that?

script.Parent.MouseButton1Down:connect(function()
	teleport = game:GetService('TeleportService'):Teleport(168448766)
	teleport.CustomizedTeleportUI = true
end)

Scratch that go to here: http://wiki.roblox.com/index.php?title=TeleportService It is probably the best reference.