Hibernate tutorial problem

I am getting the following error when I try to run the Hibernate
tutorial code below:

HERE1
HERE2
Initial SessionFactory creation failed.java.lang.NoSuchFieldError:
name
Exception in thread "main" java.lang.ExceptionInInitializerError
    at util.HibernateUtil.<clinit>(HibernateUtil.java:18)
    at events.EventManager.createAndStoreEvent(EventManager.java:50)
    at events.EventManager.main(EventManager.java:18)
Caused by: java.lang.NoSuchFieldError: name
    at org.slf4j.impl.Log4jLoggerAdapter.<init>(Log4jLoggerAdapter.java:
75)
    at
org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:
75)
    at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:103)
    at org.hibernate.cfg.Configuration.<clinit>(Configuration.java:151)
    at util.HibernateUtil.<clinit>(HibernateUtil.java:14)
    ... 2 more

Hibernate.java:

package util;
import org.hibernate.*;
import org.hibernate.cfg.*;
public class HibernateUtil {

    private static final SessionFactory sessionFactory;

    static {
        try {
            // Create the SessionFactory from hibernate.cfg.xml
            sessionFactory = new
Configuration().configure().buildSessionFactory();
        } catch (Throwable ex) {
            // Make sure you log the exception, as it might be
swallowed
            System.err.println("Initial SessionFactory creation
failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }

}

EventManager.java:

package events;
import org.hibernate.Session;
import java.util.List;
import java.util.Date;
import util.HibernateUtil;
public class EventManager {

    public static void main(String[] args) {
        EventManager mgr = new EventManager();

        System.out.println("HERE1");
        if (args[0].equals("store")) {
         System.out.println("HERE2");
            mgr.createAndStoreEvent("My Event", new Date());
            System.out.println("HERE3");
        }
}

I am running this code in Eclipse and was originally thinking it was a
problem with the log4j.properties file, but I can't figure out what
the problem is.

Your help is appreciated.

Bill