Hibernate and JavaFX: Unknown entity in org.hibernate.impl.SessionImpl

I receiving this error all time when I try to save a new "user". I hane no problem when I list the "users" recorded in my database "test"

This is my hibernate.cfg.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
  <session-factory>
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/test</property>
    <property name="hibernate.connection.username">root</property>
    <property name="hibernate.connection.password">root</property>
    <property name="hibernate.show_sql">true</property>
    <property name="hibernate.format_sql">false</property>
    <property name="hibernate.hbm2ddl.auto">update</property>
    <mapping class="test.model.Users"/>
  </session-factory>
</hibernate-configuration>

This is my Users.java:

package test.model;

import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="users")
public class Users implements Serializable {

    private static final long serialVersionUID = 1L;
    private Integer id;
    private String login;
    private String name;
    private String password;
    private String access;
    private String status;

    public Users() {
    }

    public Users(String login, String name, String password, String access, String status) {
        this.login = login;
        this.name = name;
        this.password = password;
        this.access = access;
        this.status = status;
    }

    @Id
    @Column(name="id", unique=true, nullable=false)
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    public Integer getId() {
        return this.id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    @Column(name="login", nullable=false, length=20)
    public String getLogin() {
        return this.login;
    }

    public void setLogin(String login) {
        this.login = login;
    }

    @Column(name="name", nullable=false, length=50)
    public String getName() {
        return this.name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Column(name="password", nullable=false, length=50)
    public String getPassword() {
        return this.password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Column(name="access", nullable=false, length=15)
    public String getAccess() {
        return this.access;
    }

    public void setAccess(String access) {
        this.access = access;
    }

    @Column(name="status", nullable=false, length=10)
    public String getStatus() {
        return this.status;
    }

    public void setStatus(String status) {
        this.status = status;
    }
}

Where I wrong my friends ?