} else if ($questionnaire->grade < 0) {
        $params['gradetype'] = GRADE_TYPE_SCALE;
        $params['scaleid']   = -$questionnaire->grade;

    } else if ($questionnaire->grade == 0) { //No Grade..be sure to delete the grade item if it exists
        return grade_update('mod/questionnaire', $questionnaire->courseid, 'mod', 'questionnaire', $questionnaire->id, 0, NULL, array('deleted'=>1));    

    } else {
        $params = NULL; // allow text comments only
    }