Spring's Stored Procedure - results coming back from procedure always empty

I am using Spring's JdbcTemplate and StoredProcedure classes. I am having trouble getting the stored procedure class to work for me.

I have a stored procedure on an oracle database. Its signature is

CREATE OR REPLACE PROCEDURE PRC_GET_USERS_BY_SECTION
(user_cursor OUT Pkg_Types.cursor_type
 , section_option_in IN Varchar2
 , section_in IN Varchar2) AS ....

where

TYPE cursor_type IS REF CURSOR;

I have create the following stored procedure class to get information from the oracle procedure

    private class MyStoredProcedure extends StoredProcedure 
{
    public MyStoredProcedure(JdbcTemplate argJdbcTemplate) 
    {
        super(argJdbcTemplate, "PRC_GET_USERS_BY_SECTION");
        declareParameter(new SqlOutParameter("output", OracleTypes.CURSOR));
        declareParameter(new SqlParameter("input1", Types.VARCHAR));
        declareParameter(new SqlParameter("input2", Types.VARCHAR));
        compile();          
    }


    public Map<String, Object> execute() {

        Map<String, Object> inParams = new HashMap<String, Object>();
        inParams.put("input1", "BG");
        inParams.put("input2", "FE");
        Map output = execute(inParams);
        return output;
    }
}

I am calling this in a method in one of my DAO classes

    public List<String> getUserListFromProcedure() throws BatchManagerException
{
    MyStoredProcedure sp = new MyStoredProcedure( this.jdbcTemplate );
    Map<String, Object> result = new HashMap<String, Object>();
    try
    {
        result = sp.execute();
    }

    catch( DataAccessException dae) 
    {

    }
    System.out.println(result.size());
    return null;
}

However the size of the map is always 0, so nothing comes back. I know that there are rows on the database which match my input criteria. Also I had code working which used java.