ติดปัญหาการเรียก .net เว็ปเซอร์วิสจาก PHP ครับ (Consuming .Net Webservice from PHP)

<?php
    $client = new SoapClient("http://127.0.0.1:50459/Service1.asmx?WSDL",array(
		"trace" => 1,
		"exceptions" => 0));
 
    $result = $client->CalculateVAT(array('Price' => '1000', 'VATRate' => '7'));
 
	print "<pre>\n";
	print "Request :\n".htmlspecialchars($client->__getLastRequest()) ."\n";
	print "Response :\n".htmlspecialchars($client->__getLastResponse()) ."\n";
	print "<pre>";
?>

Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.ComponentModel

' To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
<System.Web.Script.Services.ScriptService()> _
<System.Web.Services.WebService(Namespace:="http://tempuri.org/")> _
<System.Web.Services.WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<ToolboxItem(False)> _
Public Class Service1
    Inherits System.Web.Services.WebService

    <WebMethod()> _
    Public Function CalculateVAT(ByVal Price As Decimal, _
                                 ByVal VATRate As Decimal) As Decimal
        CalculateVAT = Price * (VATRate / 100)
    End Function

End Class