Java Programming

Hi!
I'm getting this exception and can't locate what is wrong:

org.hibernate.QueryException: ClassNotFoundException: org.hibernate.hql.ast.HqlToken [from com.test.model.User where userId = ?]
	org.hibernate.hql.ast.HqlLexer.panic(HqlLexer.java:57)
	antlr.CharScanner.setTokenObjectClass(CharScanner.java:340)
	org.hibernate.hql.ast.HqlLexer.setTokenObjectClass(HqlLexer.java:31)
	antlr.CharScanner.<init>(CharScanner.java:51)
	antlr.CharScanner.<init>(CharScanner.java:60)
	org.hibernate.hql.antlr.HqlBaseLexer.<init>(HqlBaseLexer.java:56)
	org.hibernate.hql.antlr.HqlBaseLexer.<init>(HqlBaseLexer.java:53)
	org.hibernate.hql.antlr.HqlBaseLexer.<init>(HqlBaseLexer.java:50)
	org.hibernate.hql.ast.HqlLexer.<init>(HqlLexer.java:26)
	org.hibernate.hql.ast.HqlParser.getInstance(HqlParser.java:44)
	org.hibernate.hql.ast.QueryTranslatorImpl.parse(QueryTranslatorImpl.java:242)
	org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:157)
	org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:111)
	org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:77)
	org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:56)
	org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:72)
	org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:133)
	org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:112)
	org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1623)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:597)
	org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:301)
	$Proxy4.createQuery(Unknown Source)
	com.test.model.UserManager.getUser(UserManager.java:15)
	com.test.test.DefaultController.handleRequest(DefaultController.java:21)
	org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:858)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:792)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:476)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:431)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

My mapping file looks like this:

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.redbet.model">
	<class name="User" table="users">

		<id name="userId" column="userId">
			<generator class="increment" />
		</id>

		<property name="username" column="username" />

	</class>
</hibernate-mapping>

And i have put the hibernate and antlr jar files in the lib directory, this is the code that fails, it fails on session.createQuery

Session session = HibernateUtil.getSessionFactory().getCurrentSession();

session.beginTransaction();

User result = (User) session.createQuery( "from User where userId = ?" ).setInteger( 0, userId ).uniqueResult();

session.getTransaction().commit();

The code for hibernateUtil looks like this:

static {
	try {
		InputStream in = Thread.currentThread().getContextClassLoader().getResourceAsStream( "hibernate.cfg.xml" );

		Configuration configuration = new Configuration().addInputStream( in ).configure();

		sessionFactory = configuration.buildSessionFactory();
	} catch( Throwable ex ) {
		LOG.fatal( "Could not create session factory: " + ex.getMessage() );
		throw new ExceptionInInitializerError( ex );
	}
}

public static SessionFactory getSessionFactory() {
	return sessionFactory;
}