Problem with Ibatis and SP with parameters

[Cesar Coz]

Hello, im new using ibatis and i wish someone could help me with this problem

im trying to access a SP in oracle, build like this

PROCEDURE SP_L_INGRESOS2 (p_consulta OUT v_curs2, p_id NUMBER);

this SP returns a cursor with a query with 3 colums and i have a POJO class "Ingreso"with the same attributes as the colums in the cursor

and i'm mapping the xml like this:

 	

	<resultMap class="Ingreso" id="IngresoResultSet">
		<result column="ID" property="id" />
		<result column="NOMBRE" property="nombre"/>
		<result column="INGRESO" property="ingreso" />		
	</resultMap>
	
	<parameterMap class="java.util.Map" id="IngresoParam">
		<parameter property="result" javaType="java.sql.ResultSet"
			jdbcType="ORACLECURSOR" mode="OUT" />
		<parameter property="id" jdbcType="NUMBER" javaType="java.lang.Integer"
			mode="IN"  />
	</parameterMap>

	<procedure id="listarIngresos" parameterMap="IngresoParam" resultMap="IngresoResultSet">
		{call HR.SOLUCION.sp_l_ingresos2(?,?)}
	</procedure>   

well i want to know how ibatis is going to know wich parameter use in the second '?', i'm putting a 'id' parameter in a Map and calling to the SP like this:

map.put("id", Integer.parseInt(id));
        lista = (ArrayList) sqlMap.queryForList("listarIngresos", map);

but i'm getting this error:

   --- The error occurred while applying a parameter map.  
--- Check the INGRESOS.IngresoParam.  
--- Check the results (failed to retrieve results).  
--- Cause: java.lang.NullPointerException
Caused by: java.lang.NullPointerException
	at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryWithCallback(GeneralStatement.java:188) 

can someone help me with this please?