我用的php扩展的soap写了一个web服务,但是运行不了,不知道是什么问题.我现在把我的服务器的代码和客户端的代码给出来~~非常的简单,我的wsdl文件是用ZD自动生成的

我的服务器端的代码:
<?php
/**
* A simple math utility class
* @author John Coggeshall john@zend.com
*/
class math {
/**
* Add two integers together
*
* @param integer $a The first integer of the addition
* @param integer $b The second integer of the addition
* @return integer The sum of the provided integers
*/
public function add($a, $b) {
return $a + $b;
}

/**
* Subtract two integers from each other
*
* @param integer $a The first integer of the subtraction
* @param integer $b The second integer of the subtraction
* @return integer The difference of the provided integers
*/
public function sub($a, $b) {
return $a - $b;
}
}
$soapserver = new SoapServer('moxSearch.wsdl');

$soapserver->setClass('Math');
$soapserver->handle();
//$soap->service($HTTP_RAW_POST_DATA);
?>


我的客户端的代码:
<?php
$client = new SoapClient("http://127.0.0.1:81/Math/moxSearch.wsdl");
echo $client->add(1,2);
?>

能给个思路不,谢谢