Those of you with the DirectX error on Windows 7 need to update your DirectX. L2.Net uses Managed DirectX which is not included in DirectX by default. You have to install the DirectX redist or use the web updater to get it.
Well here try this... connect with IG Walker on some l2j server. Try bot some action... and see if you get disconnected. If l2j can detect you... l2off and retail can.