Yeah I tried what you mentioned

    public DateUpdateEventList getDateUpdateEvents() {
        DateUpdateEventList dispList = new DateUpdateEventList();
        String sql = "select * from display where date_update_frequency > 0";
        Query query = manager.createNativeQuery(sql);
        List results = query.getResultList();
        System.out.println(results.get(0).getClass());
        //for (Vector v : results) {
            //dispList.addDate(v);
        //}
        return dispList;
    }

However I got the same error and a HUGE list of the following:
ERROR: null
ERROR: null
ERROR: null
ERROR: null

Maybe something wrong with my manager.createNativeQuery(0)?

I have just realised that that return statement would return a null :\ *face palm*

javax.ejb.EJBException: nested exception is: java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 
        java.rmi.RemoteException: null; nested exception is: 
        java.lang.ClassCastException: java.util.Vector cannot be cast to java.util.ArrayList
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 
        java.rmi.RemoteException: null; nested exception is: 
        java.lang.ClassCastException: java.util.Vector cannot be cast to java.util.ArrayList
        at com.sun.corba.ee.impl.javax.rmi.CORBA.Util.mapSystemException(Util.java:243)
        at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:205)
        at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:152)
        at com.sun.corba.ee.impl.presentation.rmi.bcel.BCELStubBase.invoke(BCELStubBase.java:225)
        at com.jmwrti.session.event.__EventRemote_Remote_DynamicStub.getDateUpdateEvents(com/jmwrti/session/event/__EventRemote_Remote_DynamicStub.java)
        at com.jmwrti.session.event._EventRemote_Wrapper.getDateUpdateEvents(com/jmwrti/session/event/_EventRemote_Wrapper.java)
        at com.jmwrti.rtiserver.EventProcessor.getDateUpdates(EventProcessor.java:212)
        at com.jmwrti.rtiserver.EventProcessor.run(EventProcessor.java:302)
        at java.lang.Thread.run(Thread.java:722)
Caused by: java.rmi.RemoteException: null; nested exception is: 
        java.lang.ClassCastException: java.util.Vector cannot be cast to java.util.ArrayList
        at com.sun.enterprise.iiop.POAProtocolMgr.mapException(POAProtocolMgr.java:251)
        at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1411)
        at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1316)
        at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:210)
        at com.sun.ejb.containers.EJBObjectInvocationHandlerDelegate.invoke(EJBObjectInvocationHandlerDelegate.java:117)
        at $Proxy86.getDateUpdateEvents(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor628.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:154)
        at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatchToServant(CorbaServerRequestDispatcherImpl.java:687)
        at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatch(CorbaServerRequestDispatcherImpl.java:227)
        at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequestRequest(CorbaMessageMediatorImpl.java:1846)
        at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:1706)
        at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleInput(CorbaMessageMediatorImpl.java:1088)
        at com.sun.corba.ee.impl.protocol.giopmsgheaders.RequestMessage_1_2.callback(RequestMessage_1_2.java:223)
        at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:806)
        at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.dispatch(CorbaMessageMediatorImpl.java:563)
        at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.doWork(CorbaMessageMediatorImpl.java:2567)
        at com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:555)
Caused by: java.lang.ClassCastException: java.util.Vector cannot be cast to java.util.ArrayList
        at com.jmwrti.session.event.EventBean.getDateUpdateEvents(EventBean.java:444)
        at sun.reflect.GeneratedMethodAccessor629.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.enterprise.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1011)
        at com.sun.enterprise.security.SecurityUtil.invoke(SecurityUtil.java:175)
        at com.sun.ejb.containers.BaseContainer.invokeTargetBeanMethod(BaseContainer.java:2920)
        at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4011)
        at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:203)
        ... 16 more
javax.ejb.EJBException: nested exception is: java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 
        java.rmi.RemoteException: null; nested exception is: 
        java.lang.ClassCastException: java.util.Vector cannot be cast to java.util.ArrayList
        at com.jmwrti.session.event._EventRemote_Wrapper.getDateUpdateEvents(com/jmwrti/session/event/_EventRemote_Wrapper.java)
        at com.jmwrti.rtiserver.EventProcessor.getDateUpdates(EventProcessor.java:212)
        at com.jmwrti.rtiserver.EventProcessor.run(EventProcessor.java:302)
        at java.lang.Thread.run(Thread.java:722)

Sorry if this looks a mess I wasn't to sure how I should paste this in..

never mind, I've sorted it out now with the following code:

                for(Object s: list)
                {
                    if(s.toString().contains("Value"))
                    {
                        slist.add(s);
                    }
                }

Whisper Gold! they came back for a short while...I think its just a England thing though...

A good place that I have been using is Project Euler not so much for gaming but good coding concepts and handy for making your code very efficient