Problem setting up gilead with gwt.

Getting this error:

 java.lang.ClassCastException: org.hibernate.internal.SessionFactoryImpl cannot be cast to org.hibernate.service.internal.ConcurrentServiceBinding$Entry

at net.sf.gilead.util.IntrospectionHelper.searchMember(IntrospectionHelper.java:206)

at net.sf.gilead.util.IntrospectionHelper.searchMember(IntrospectionHelper.java:149)

at net.sf.gilead.core.hibernate.HibernateUtil.setSessionFactory(HibernateUtil.java:170)

code used: 

public class ProjectServiceImpl extends PersistentRemoteService implements ProjectService{

/**

* 

*/

private static final long serialVersionUID = 1L;

/**

* Constructor

*/

public ProjectServiceImpl() {

try {

HibernateUtil hibernateUtil = new HibernateUtil();    

hibernateUtil.setSessionFactory( new Configuration().configure().buildSessionFactory());

PersistentBeanManager persistentBeanManager = new PersistentBeanManager();   // Error at this line

persistentBeanManager.setPersistenceUtil(hibernateUtil); 

persistentBeanManager.setProxyStore(new StatelessProxyStore());

setBeanManager(persistentBeanManager);

} catch (Exception e) {

e.printStackTrace();

}

}
}

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