myBatis/iBatis (keyProperty) Problema no Retorno do Insert

Assuntos Gerais
#1 
/**
	 * Insert an instance of Contact into the database.
	 * @param contact the instance to be persisted.
	 */
	@Insert(INSERT)
	@Options(useGeneratedKeys = false, keyProperty = "id")
	void insert(Contact contact);
/**
	 * Insert an instance of Contact into the database.
	 * @param contact the instance to be persisted.
	 */
	public void insert(Contact contact){

		SqlSession session = sqlSessionFactory.openSession();

		try {
			
			ContactMapper mapper = session.getMapper(ContactMapper.class);
			mapper.insert(contact);

			session.commit();
		} finally {
			session.close();
		}
	}
class Contact {

	private int id;
	private String name;
	private String phone;
	private String email;

//gets and setters
...
CREATE TABLE  `blog`.`contact` (
  `CONTACT_ID` int(11) NOT NULL AUTO_INCREMENT,
  `CONTACT_EMAIL` varchar(255) NOT NULL,
  `CONTACT_NAME` varchar(255) NOT NULL,
  `CONTACT_PHONE` varchar(255) NOT NULL,
  PRIMARY KEY (`CONTACT_ID`)
) 
ENGINE=InnoDB;

Alguem saberia me dizer porque
não retorna o ID no objeto apos fazer um Insert?
sempre retorna 0

#2