final KnapperClientCore clientCore = KnapperClientCore.getDefault();
IClientSession client = clientCore.getClientSession();
if (listener == null) {
listener = new IEventListener() {
public void handleEvent(IEvent event) {
if (event instanceof ClientChangeEvent) {
ClientChangeEvent cce = (ClientChangeEvent) event;
if (cce.getChange() == ClientChangeEvent.AUTHENTICATED) {