NHibernate Mapping intermediary table

public class UserVO
{
    public virtual int id { get; set; }
    public virtual string name { get; set; }
    public virtual string pass { get; set; }
    public virtual string email { get; set; }
    public virtual string level { get; set; }
    public virtual List<LocalCalendarGroupVO> localCalendarGroups { get; set; }
}
public class LocalCalendarGroupVO
{

    public virtual int id { get; set; }
    public virtual string name { get; set; }

}

<class name="UserVO" table="tb_users" lazy="false">

<id name="id" column="id">

  <generator class="native" />

</id>

<property name="name" />
<property name="pass" />
<property name="level" />
<property name="email" />
<property name="localCalendarGroups"/>

<class name="UserVO" table="tb_users">
    <id name="id" column="id">
        <generator class="native" />
    </id>
    <property name="name" />
    <property name="pass" />
    <property name="level" />
    <property name="email" />

    <bag name="localCalendarGroups" table="user_localCalendarGroup">
        <key column="userID" />
        <many-to-many class="LocalCalendarGroupVO" column="calID" />
    </bag>
</class>

public class UserVO
{
    public virtual int id { get; set; }
    public virtual string name { get; set; }
    public virtual string pass { get; set; }
    public virtual string email { get; set; }
    public virtual string level { get; set; }
    public virtual IList<LocalCalendarGroupVO> localCalendarGroups { get; set; }
}