Problem with AddressBook demo

Hi everyone! This is most likely a newbie question but it nevertheless got me stumped; I have Eclipse Indigo and a jBoss entity running on-top of an windows 7 64 bit OS.

I want to learn as much as possible about vaadin as I intend to use it in a larger project and it looks like it have what I want. Anyhow; I installed the vaadig plugins in eclipse, and created my very first vaadin application (hello world). Everything went smoothly. I expanded on that application and created som enifty buttons, labels etc. And everything went well and deployed nicely on the jboss entity.

I then decided to take the plunge and add some JPA functionality. Now thing went downhill. I took the AddressBook demo enhanced with JPA (as found in https://vaadin.com/wiki/-/wiki/Main/Adding%20JPA%20to%20the%20Address%20Book%20Demo) and created a new project in Eclipse.

The project looks Ok. I run a clean and build (just for the sake of it). I then deploy to the jboss entity (so far so good). Then I get;

=================================================================
Vaadin is running in DEBUG MODE.
Add productionMode=true to web.xml to disable debug features.
To show debug window, add ?debug to your application URL.
=================================================================
16:39:07,702 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/AddressBook].[Addressbook Application]] (http--127.0.0.1-8080-2) Servlet.service() for s
ervlet Addressbook Application threw exception: java.lang.InstantiationException: com.vaadin.demo.tutorial.addressbook.AddressBookApplication
        at java.lang.Class.newInstance0(Unknown Source) [:1.6.0_30]
        at java.lang.Class.newInstance(Unknown Source) [:1.6.0_30]
        at com.vaadin.terminal.gwt.server.ApplicationServlet.getNewApplication(ApplicationServlet.java:82) [vaadin-6.7.6.jar:]
        at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.createApplication(AbstractApplicationServlet.java:978) [vaadin-6.7.6.jar:]
        at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.findApplicationInstance(AbstractApplicationServlet.java:801) [vaadin-6.7.6.jar:]
        at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:456) [vaadin-6.7.6.jar:]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.7.Final.jar:]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.7.Final.jar:]
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.7.Final.jar:]
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.7.Final.jar:]
        at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.1.0.CR1b.jar:7.1.0.CR1b]
        at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:151) [jboss-as-web-7.1.0.CR1b.jar:7.1.0.CR1b]
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.7.Final.jar:]
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.7.Final.jar:]
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.7.Final.jar:]
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362) [jbossweb-7.0.7.Final.jar:]
        at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:897) [jbossweb-7.0.7.Final.jar:]
        at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:626) [jbossweb-7.0.7.Final.jar:]
        at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:2033) [jbossweb-7.0.7.Final.jar:]
        at java.lang.Thread.run(Unknown Source) [:1.6.0_30]

The code which should run and produce an application looks like;

@WebServlet (urlPatterns = "/*")
    public static class Servlet extends AbstractApplicationServlet
    {
	  @EJB
	  PersonManager personManager;

      @Override
      protected Application getNewApplication (HttpServletRequest request) throws ServletException 
      {
        return new AddressBookApplication (personManager);
      }

      @Override
      protected Class<? extends Application> getApplicationClass () throws ClassNotFoundException
      {
        return AddressBookApplication.class;
      }
    }

Obviously it seems to fail in getNewApplication. It is just silent, I have no clue why it fails to instantiate the project...

The deployed system looks Ok, from what I can say with my limited experience.

web.xml looks ok.

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
	<display-name>AddressBook</display-name>
	<context-param>
		<description>
		Vaadin production mode</description>
		<param-name>productionMode</param-name>
		<param-value>false</param-value>
	</context-param>
	<servlet>
		<servlet-name>Addressbook Application</servlet-name>
		<servlet-class>com.vaadin.terminal.gwt.server.ApplicationServlet</servlet-class>
		<init-param>
			<description>
			Vaadin application class to start</description>
			<param-name>application</param-name>
			<param-value>com.vaadin.demo.tutorial.addressbook.AddressBookApplication</param-value>
		</init-param>
	</servlet>
	<servlet-mapping>
		<servlet-name>Addressbook Application</servlet-name>
		<url-pattern>/*</url-pattern>
	</servlet-mapping>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
</web-app>

Its just not starting... For whatever reason. The vaadin revision is 6.7.6 (in the /lib).

This is driving me crazy... :-) It should just work... After all it is a demonstration example :-).

Persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence 
  version            = "2.0"
  xmlns              = "http://java.sun.com/xml/ns/persistence" 
  xmlns:xsi          = "http://www.w3.org/2001/XMLSchema-instance" 
  xsi:schemaLocation = "http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
  <persistence-unit name="My_descriptor" transaction-type="JTA">
    <!--provider>org.eclipse.persistence.jpa.PersistenceProvider</provider-->
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>java:jboss/datasources/ExampleDS</jta-data-source>
    <!--  jar-file>lib/AddressBook.jar</jar-file -->
    <properties>
      <property name = "hibernate.dialect"          value = "org.hibernate.dialect.HSQLDialect" />
      <property name="hibernate.hbm2ddl.auto"       value="create-drop"/>
      <!-- property name = "hibernate.dialect"          value = "org.hibernate.dialect-PostgreSQLDialect" / -->

      <!--  property name = "eclipselink.ddl-generation" value = "create-tables"/ -->
    </properties>
  </persistence-unit>
</persistence>

I add the complete project in the attachements... (as is).