สอบถาม web service เขียนเว็บเซอร์วิสด้วย php แล้วเรียกใช้งานไม่ได้ครับ

<?
require_once("lib/nusoap.php");
 
//Create a new soap server

$server = new soap_server();

//Define our namespace

$namespace = "http://localhost/nusoap/WebServiceServer.php";
$server->wsdl->schemaTargetNamespace = $namespace;
 
//Configure our WSDL

$server->configureWSDL("getCustomer");
------------------------------------------------------------------------

<?

	if($_POST["txtCountry"] != "")

	{
	include("lib/nusoap.php");
	$client = new nusoap_client("http://localhost/nusoap/WebServiceServer.php?wsdl",true);
	$params = array(
	'strCountry' => $_POST["txtCountry"]
	);
	$data = $client->call('resultCustomer', $params);