[HELP] Problem with Hibernate, MySQL, ZK (CRUD Operation)

<?page title="Auto Generated index.zul"?>

<?init class="org.zkoss.zkplus.databind.AnnotateDataBinderInit"?>
<window id="win" title="To Do List" border="normal" width="640px"
	apply="org.todo.action.TodoAct">
	<listbox id="box" rows="5" model="@{win$composer.allEvents}"
	selectedItem="@{win$composer.current }">
		<listhead>
			<listheader label="Item" sort="auto(name)" />
			<listheader label="Priority" width="80px" sort="auto(priority)" />
			<listheader label="Date" width="170px" sort="auto(date)" />
		</listhead>
		<listitem self="@{each='event'}" value="@{event}">
			<listcell label="@{event.name }"/>
			<listcell label="@{event.priority }"/>
			<listcell label="@{event.date }"/>
		</listitem>
	</listbox>
	<groupbox>
	<caption label="Event">
	Item:	<textbox id="name" cols="25" value="@{win$composer.current.name}"/>
	Priority:	<textbox id="priority" cols="1" value="@{win$composer.current.priority}" />
	Date:	<datebox cols="8" value="@{win$composer.current.date}"/>
	<button id="add" onClick="" label="Add"></button>
	<button id="update" onClick="" label="Update"></button>
	<button id="delete" onClick="" label="Delete"></button>
	</caption>
	</groupbox>
</window>

package org.todo.action;

import java.util.ArrayList;
import java.util.List;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.tool.hbm2ddl.SchemaExport;
import org.omg.CORBA.Current;
import org.todo.model.TodoModel;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.event.EventListener;
import org.zkoss.zk.ui.util.GenericForwardComposer;
import org.zkoss.zkplus.databind.AnnotateDataBinder;
import org.zkoss.zkplus.hibernate.HibernateUtil;
import org.zkoss.zul.Button;
import org.zkoss.zul.Datebox;
import org.zkoss.zul.Listbox;
import org.zkoss.zul.Listcell;
import org.zkoss.zul.Listitem;
import org.zkoss.zul.ListitemRenderer;
import org.zkoss.zul.SimpleListModel;
import org.zkoss.zul.Textbox;

public class TodoAct extends GenericForwardComposer {
	private static final long serialVersionUID = -9145887024839938515L;
	List<TodoModel> allMain = new ArrayList<TodoModel>();

	/* component */
	TodoModel current;
	Listbox box;
	Textbox name, priority;
	Datebox date;
	Button add, update, delete;

	AnnotateDataBinder binder;

	@Override
	public void doAfterCompose(Component comp) throws Exception {
		super.doAfterCompose(comp);

		binder = new AnnotateDataBinder(comp);
		Session em = HibernateUtil.currentSession();
		System.out.print("doAfterCompose");
	}

	public void onClick$add() throws InterruptedException {
		Session session = HibernateUtil.currentSession();
		current.setName(name.getValue());
		current.setPriority(priority.getValue());
		current.setDate(date.getValue());
		session.saveOrUpdate(current);
	}

	public void onClick$update() throws InterruptedException {
		name.setValue(current.getName());
		priority.setValue(current.getPriority());
		date.setValue(current.getDate());
	}

	public List<TodoModel> getAllMain() {
		Session session = HibernateUtil.currentSession();
		allMain = session.createCriteria(TodoModel.class).list();
		return allMain;
	}

	public void setAllMain(List<TodoModel> allMain) {
		this.allMain = allMain;
	}

	public void renderList() {
		SimpleListModel model = new SimpleListModel(getAllMain());
		box.setModel(model);
		box.setItemRenderer(new ListitemRenderer() {

			@Override
			public void render(Listitem item, Object data) throws Exception {
				// TODO Auto-generated method stub
				final TodoModel todo = (TodoModel) data;

				new Listcell("" + todo.getName()).setParent(item);
				new Listcell("" + todo.getPriority()).setParent(item);
				new Listcell("" + todo.getDate()).setParent(item);
				item.addEventListener("OnClick", new EventListener() {

					@Override
					public void onEvent(Event event) throws Exception {
						// TODO Auto-generated method stub
						current = todo;
					}
				});
			}
		});
	}
}

package org.todo.model;

import java.util.Date;

import javax.persistence.*;

@Entity
public class TodoModel {
	private String id;
	private String name;
	private String priority;
	private Date date;
	
	@Id
	public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getPriority() {
		return priority;
	}
	public void setPriority(String priority) {
		this.priority = priority;
	}
	public Date getDate() {
		return date;
	}
	public void setDate(Date date) {
		this.date = date;
	}
	
	
}

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.zkoss.zk.ui.UiException: Expects java.util.Set, java.util.List, java.util.Map, Object[], Enum Class, or BindingListModel only. class org.todo.action.TodoAct
	org.zkoss.zkplus.databind.ListModelConverter.coerceToUi(ListModelConverter.java:57)
	org.zkoss.zkplus.databind.Binding.myLoadAttribute(Binding.java:366)
	org.zkoss.zkplus.databind.Binding.loadAttribute(Binding.java:336)
	org.zkoss.zkplus.databind.DataBinder.loadAttrs(DataBinder.java:591)
	org.zkoss.zkplus.databind.DataBinder.loadComponent0(DataBinder.java:546)
	org.zkoss.zkplus.databind.DataBinder.loadAll(DataBinder.java:575)
	org.zkoss.zkplus.databind.AnnotateDataBinderInit.doAfterCompose(AnnotateDataBinderInit.java:175)
	org.zkoss.zk.ui.impl.RealInits.doAfterCompose(Initiators.java:82)
	org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage0(UiEngineImpl.java:376)
	org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage(UiEngineImpl.java:291)
	org.zkoss.zk.ui.http.DHtmlLayoutServlet.process(DHtmlLayoutServlet.java:243)
	org.zkoss.zk.ui.http.DHtmlLayoutServlet.doGet(DHtmlLayoutServlet.java:164)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.29 logs.