EJB3 Client with JBoss error: java.lang.NoSuchFieldError: TRACE

// Table ADMIN: 
//    Username nvarchar(20) PK
//    Password nvarchar(20)
 
**** Entity bean: Admin ****
@Entity
@Table(name = "Admin", schema = "dbo", catalog = "TungaRestaurant", uniqueConstraints = {})
public class Admin implements java.io.Serializable {
	private String username;
	private String password;
 
	public Admin(String username, String password) {
		this.username = username;
		this.password = password;
	}
 
	@Id
	@Column(name = "Username", unique = true, nullable = false, insertable = true, updatable = true, length = 20)
	public String getUsername() {
		return this.username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
 
	@Column(name = "Password", unique = false, nullable = false, insertable = true, updatable = true, length = 20)
	public String getPassword() {
		return this.password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
}
 
*** Session Bean to manage Admin Entity: AdminBean ***
@Stateless
public class AdminBean implements Serializable, AdminMan, AdminBeanLocal, AdminBeanRemote {
	@PersistenceContext
	EntityManager em;
	public int delete(Admin admin) {
		return delete (admin.getUsername());
	}
 
	public int delete(String usr) {
		int retVal = 0;
		Admin admin = em.find(Admin.class, usr);
		try
		{
			em.remove(admin);
		}
		catch (Exception ex)
		{
			retVal = -1;
		}		
		return retVal;
	}
 
	public Admin findAdmin(String usr) {
		return em.find(Admin.class, usr);
	}
 
	public int save(Admin admin) {
		int retVal = 0;
		try {
			Admin dbadmin = em.find(Admin.class, admin.getUsername());
			if (dbadmin == null)
				em.persist(admin);
			else
			{
				dbadmin.setPassword(admin.getPassword());
				em.flush();
			}
		} catch (Exception ex) {
			retVal = -1;
		}
		return retVal;
	}
}
 
*** Interface AdminMan ****
public interface AdminMan {
	/*
	 * Return an the Admin with username
	 * @param String username
	 * @return a tunga.ejb.Admins object
	 */
	public Admin findAdmin(String usr);
	
	/*
	 * Save the Admin's information to database, if the Admin is existed, the info
	 * will be update, if not, a new Admin will be inserted to database.
	 * @param tunga.ejb.Admin the Admin object that holds information
	 * @return 0 if ok, <0 if not
	 */
	public int save(Admin admin);
	
	/*
	 * Delete the Admin from the database
	 * @param tunga.ejb.Admin the Admin object that holds information
	 * @return 0 if ok, <0 if not
	 */
	public int delete(Admin admin);
	
	/*
	 * Delete the Admin from the database
	 * @param int the Admin's username
	 * @return 0 if ok, <0 if not
	 */
	public int delete(String usr);
}
 
*********************************
The Client:
 
**** File: jndi.properties ****
java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
java.naming.provider.url=localhost:1099
 
***** File: log4j.properties *****
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
log4j.rootLogger=debug, stdout
 
**** Class test Client
public class TestEJBClient {
    public static void main(String[] args) {
    	Context context;
		try		
		{
			context = new InitialContext();
			AdminMan adminMan = (AdminMan)context.lookup("AdminBean");
 
			Admin admin = new Admin("admin","123");
			adminMan.save(admin);
 
		} catch (NamingException e)
		{
			e.printStackTrace();
		}
    }
}