Scheduler search function on combo with concat not working

Suite and Optimus Suite 5
#1

search function on combo with concat fields not working. Also, is there a way to use multi column combo in scheduler?

This is my code

<?php
	require_once('../../common/connector/combo_connector.php');
	include ('../../common/config_webdoctor.php');

	$combo = new ComboConnector($res, $dbtype);

	$combo->event->attach("beforeFilter", "by_id");
	function by_id($filter) {
		if (isset($_GET['id']))
			$filter->add("patient_id", $_GET['id'], '=');
	}	

	$combo->dynamic_loading(3);
    $combo->render_sql("SELECT patient_id ,CONCAT(first_name,' ',last_name) as label from patient","patient_id","label")
?>