Camera Subject not working?

I made a script where its supposed to make your camera lock to a different thing, I've done it before, now It doesn't work. Help?

game.Players.PlayerAdded:connect(function()
	game.Workspace.CurrentCamera.CameraSubject = Workspace.Tablet
	game.Workspace.CurrentCamera.CameraType = "Scriptable"
end)

Try setting the CameraType to Scriptable before setting the CameraSubject.