ZK Spring 3, Scope problem

<?page title="new page title" contentType="text/html;charset=UTF-8"?>
<?variable-resolver class="org.zkoss.spring.DelegatingVariableResolver"?> 
<zk>
<window id="scopeTestWin" apply="${scopeTestCtrl}"  title="Main Page" border="0" width="100%" height="auto">
	<button id="openPopup" label="Open Popup" />
</window>
</zk>

@Controller("scopeTestCtrl")
@Scope("prototype")
public class ScopeTestController extends GenericSpringComposer {
	
	@Autowired
	private ScopeTestModel scopeTestModel;
	
	@Autowired
	private Window scopeTestWin;
	@Autowired
	private Button openPopup;
	
	private boolean sameObj = false;
	
	@EventHandler("scopeTestWin.onCreate")
	public void doCreateWindow(Event event){
		System.out.println("scopeTestCtrl");
		if(sameObj){
			System.out.println("old bean");
		}else{
			System.out.println("new bean");
			sameObj = true;
		}
		
		if(scopeTestModel.getModelName() != null){
			System.out.println("old model bean");
		}else{
			System.out.println("new model bean");
			scopeTestModel.setModelName("Main Window");
		}
		
		System.out.println("openPopup-->[" + openPopup.hashCode() + "] label=" + openPopup.getLabel());
	}
	
	@EventHandler("openPopup.onClick")
	public void doClickOpenPopup(Event event) throws SuspendNotAllowedException, InterruptedException{
		System.out.println("scopeTestCtrl openPopup");
		Window popupWin = (Window) Executions.getCurrent().createComponents("/exam23/scope_test_popup.zul",scopeTestWin, null);
		popupWin.doModal();
	}

}

<?page title="new page title" contentType="text/html;charset=UTF-8"?>
<?variable-resolver class="org.zkoss.spring.DelegatingVariableResolver"?> 
<zk>
<window id="scopeTestPopupWin" apply="${scopeTestPopupCtrl}" title="This is popup" border="normal" width="200px" height="100px" closable="true">
	<button id="openPopup" label="Open Popup 2" />
</window>
</zk>

@Controller("scopeTestPopupCtrl")
@Scope("prototype")
public class ScopeTestPopupController extends GenericSpringComposer {
	@Autowired
	private ScopeTestModel scopeTestModel;
	
	@Autowired
	private Window scopeTestPopupWin;
	@Autowired
	private Button openPopup;
	
	private boolean sameObj = false;
	
	@EventHandler("scopeTestPopupWin.onCreate")
	public void doCreateWindow(Event event){
		System.out.println("scopeTestPopupCtrl");
		if(sameObj){
			System.out.println("old bean");
		}else{
			System.out.println("new bean");
			sameObj = true;
		}
		
		if(scopeTestModel.getModelName() != null){
			System.out.println("old model bean");
		}else{
			System.out.println("new model bean");
			scopeTestModel.setModelName("Main Window");
		}
		
		System.out.println("openPopup-->[" + openPopup.hashCode() + "] label=" + openPopup.getLabel());
	}
	
	@EventHandler("openPopup.onClick")
	public void doClickOpenPopup(Event event) throws SuspendNotAllowedException, InterruptedException{
		System.out.println("scopeTestPopupCtrl openPopup");
	}
}