Problema com mapaeamento no Hibernate 3

package syslagg.beans;


import javax.persistence.*;

@Entity(access=AccessType.FIELD)
@Table(name="Aluno")
public class Aluno{
    @Id()
    private int ra;          // Ra do Aluno
    
    @Column(name="nome", nullable=false, length=60)
    private String nome;     // Nome completo do Aluno
    
    @Column(name="email", nullable=true, length=50)
    private String email;    // Endereço de e-mail
    
    @Column(name="telefone", nullable=true, length=14)
    private String telefone; // Telefone para contato
    
    @Column(name="celular", nullable=true, length=14)
    private String celular;  // Celular para contato
    
    @Column(name="curso", nullable=false, length=255)
    private String curso;    // Curso que faz
    
    @Column(name="serie", nullable=false, length=1)
    private String serie;    // Série que cursa
    
    @Column(name="campus", nullable=false, length=50)
    private String campus;   // Campus onde estuda
    
    @Column(name="estagio", nullable=false)
    @ManyToOne()
    private int estagio;     // Tipo de estágio

        
    public void setRa (int ra){
        this.ra = ra;
    }

    int getRa(){
        return this.ra;
    }
    
    public void setNome (String nome){
        this.nome = nome;
    }
    String getNome (){
        return this.nome;
    }
    
    public void setEmail(String email){
        this.email = email;
    }
    String getEmail(){
        return this.email;
    }
    
    public void setTelefone(String telefone){
        this.telefone = telefone;
    }
    String getTelefone(){
        return this.telefone;
    }
    
    public void setCelular(String celular){
        this.celular = celular;
    }
    String getCelular(){
        return this.celular;
    }
    
    public void setCurso(String curso){
        this.curso = curso;
    }
    String getCurso(){
        return this.curso;
    }
    
    public void setSerie(String serie){
        this.serie = serie;
    }
    String getSerie(){
        return this.serie;
    }
    
    public void setCampus(String campus){
        this.campus = campus;
    }
    String getCampus(){
        return this.campus;
    }
    
    public void setEstagio (int estagio){
        this.estagio = estagio;
    }
    
    @ManyToOne(cascade=CascadeType.MERGE)
    public int getEstagio (){
        return this.estagio;
    }
}

package syslagg;

import org.hibernate.*;
import org.hibernate.cfg.*;
import org.hibernate.Session.*;
import org.hibernate.dialect.*;
import org.hibernate.tool.hbm2ddl.SchemaUpdate;

public class Main {
    
    public static void main(String[] args) {
        AnnotationConfiguration cfg = new AnnotationConfiguration();
        
        // Configurando os Parametros
        cfg.addAnnotatedClass(syslagg.beans.Aluno.class);
        
        cfg.setProperty( "hibernate.dialect", "org.hibernate.dialect.PostgreSQLDialect" );
        cfg.setProperty( "hibernate.connection.driver_class", "org.postgresql.Driver" );
        cfg.setProperty( "hibernate.connection.url", "jdbc:postgresql:hibernate" );
        cfg.setProperty( "hibernate.connection.username", "postgres" );
        cfg.setProperty( "hibernate.connection.password", "kamikaze" );
        cfg.setProperty( "hibernate.connection.autocommit", "true" );
        cfg.setProperty( "hibernate.show_sql", "true" ); 
        
        SessionFactory factory = cfg.buildSessionFactory();
        
        SchemaUpdate update = new SchemaUpdate(cfg);
        update.execute(true,true);
        
    }    
}

init:
deps-jar:
Compiling 1 source file to D:\_Cainfu\SysLaGG\build\classes
compile:
run:
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" java.lang.NoSuchMethodError: org.hibernate.cfg.Mappings.<init>(Ljava/util/Map;Ljava/util/Map;Ljava/util/Map;Ljava/util/Map;Ljava/util/Map;Ljava/util/Map;Ljava/util/List;Ljava/util/List;Lorg/hibernate/cfg/NamingStrategy;Ljava/util/Map;Ljava/util/Map;Ljava/util/Map;)V
        at org.hibernate.cfg.ExtendedMappings.<init>(ExtendedMappings.java:42)
        at org.hibernate.cfg.AnnotationConfiguration.createExtendedMappings(AnnotationConfiguration.java:72)
        at org.hibernate.cfg.AnnotationConfiguration.addAnnotatedClass(AnnotationConfiguration.java:44)
        at syslagg.Main.main(Main.java:15)
Java Result: 1
BUILD SUCCESSFUL (total time: 1 second)