PHP中关于SOAP问题

<?php
$objSoapClient = new SoapClient("http://system.4haiyou.com/Merchant/Order.asmx?WSDL");
$pwd = 'e10adc3949ba59abbe56e057f20f883e';
try{
$param = array('userName'=>'jerry@163.com',
'password'=>$pwd,
'Address1'=>'Baoan',
'Address2'=>'mingyou',
'City'=>'Shenzhen',
'ContactName'=>'Zhangjunwen',
'Country'=>'CN',
'OrderLine'=>'test',
'OrderNumber'=>'11111111',
'Phone'=>'111111111',
'Province'=>'Guangdong',
'ShippingFee'=>'',
'ShippingType'=>'',
'Status'=>'',
'TrackingNumber'=>'',
'Value'=>'',
'Zipcode'=>'',
'GuaranteePrice'=>''
); 
$out = $objSoapClient->AddOrder($param);
$data = $out->AddOrderResult;
echo $data->ACK;
echo '
';
}catch(SoapFault $e){
print $e->getMessage();
}
?>

以上代码执行 无报错 也无返回信息， 不知道 这样写 代码错了没，新手求帮助！求帮助！求帮助！求帮助！