ORA-06550错误。请大侠们求解

Question

{"ORA-06550: 第 1 行, 第 7 列: \nPLS-00306: 调用 'PROC_APPNOLIST' 时参数个数或类型错误\nORA-06550: 第 1 行, 第 7 列: \nPL/SQL: Statement ignored\n"}
 OracleParameter[] pm = new OracleParameter[7];            pm[0] = new OracleParameter("cardno", OracleType.VarChar,10);
            pm[0].Direction = ParameterDirection.Input;
            pm[0].Value = cardNo;            pm[1] = new OracleParameter("userid", OracleType.VarChar, 20);
            pm[1].Direction = ParameterDirection.Input;
            pm[1].Value = userID;            pm[2] = new OracleParameter("secrityno", OracleType.VarChar, 32);
            pm[2].Direction = ParameterDirection.Input;
            pm[2].Value = secrityNo;            pm[3] = new OracleParameter("cardserno", OracleType.VarChar, 32);
            pm[3].Direction = ParameterDirection.Input;
            pm[3].Value = cardSerNo;            pm[4] = new OracleParameter("curout", OracleType.Cursor);
            pm[4].Direction = ParameterDirection.Output;            pm[5] = new OracleParameter("resultcode", OracleType.Int16);
            pm[5].Direction = ParameterDirection.Output;            pm[6] = new OracleParameter("errormsg", OracleType.VarChar, 200);
            pm[6].Direction = ParameterDirection.Output;
            #endregion            DataSet ds = new DataSet();            using (OracleConnection conn = new OracleConnection(strConn))
            {
                try
                {
                    conn.Open();
                    OracleCommand cmd = conn.CreateCommand();
                    cmd.CommandType = CommandType.StoredProcedure;
                    cmd.CommandText = "pkg_autobillservice.proc_getbillinfo";
                    //cmd.Parameters.AddRange(pm);
                    foreach (OracleParameter om in pm) 
                    {
                        cmd.Parameters.Add(om);
                    }
                    OracleDataAdapter oda = new OracleDataAdapter(cmd);
                    oda.Fill(ds, "table");
                }
                catch (Exception e)
                {
                    throw e;
                }
            }
在oda.Fill(ds,"table") 处，
一下是存储过程。PROCEDURE proc_getbillinfo(patientid  IN VARCHAR2,
                             userid     IN VARCHAR2,
                             password   IN VARCHAR2,
                             cardserno  IN VARCHAR2,
                             curout     OUT ref_cur,
                             resultcode OUT INTEGER,
                             errormsg   OUT VARCHAR2) AS                             
    v_sql VARCHAR2(2000);
  BEGIN
    proc_cardcheck(patientid, password, cardserno, resultcode);    IF resultcode <> 0 THEN
      resultcode := 1;
      errormsg   := 'HIS:卡验证失败!!';
      RETURN;
    END IF;      v_sql := 'select  item_code,item_name,item_class,class_name,
                      costs,amount,dept_name,rcptgroupid
              from v_outp_orders_costs
             WHERE patient_id = :cardno'; 
             
    OPEN curout FOR v_sql
      USING patientid;    resultcode := 0;
    errormsg   := '';
  EXCEPTION
    WHEN OTHERS THEN
      ROLLBACK;
      resultcode := 1;
      errormsg   := SQLERRM;
  END proc_getbillinfo;