mybatis spring ref cursor mapping

I am using mybatis-spring and trying to map a ref cursor from oracle. The result is coming back as null. Any ideas please?

<select id="check" parameterType="myVO" 
        resultMap="VOResultMap" statementType="CALLABLE" resultType="object">
{ call MYPKG.proc_check(
        #{myVO.id, javaType=String, jdbcType=VARCHAR,mode=IN},
        #{myVO, mode=OUT, javaType=ResultSet, jdbcType=CURSOR, resultMap=VOResultMap}
)}  

SP:

PROCEDURE proc_check (        
    p_id IN VARCHAR2, po_outCursor OUT SYS_REFCURSOR)
IS
BEGIN        
        OPEN po_outCursor FOR 
            SELECT * FROM MYTABLE; 
END;

Map:

<resultMap id="VOResultMap" type="myVO">
    <result property="action" column="ACTION" />
    <result property="id" column="ID" />
    <result property="name" column="NAME" />
</resultMap>

DAO:

public MyVO check(@Param("VO") MyVO myVO);

Usage:

MyVO myVO = new MyVO(id);
MyVO obj = myDAO.check(myVO);
// obj is null !!

Many thanks,