HTTP错误：HTTP身份验证失败的nusoap php API

Question

访问链接（http://mef.com.pk/test/samples/test.php）

require_once('../lib/nusoap.php');
$client = new nusoap_client("http://miuc.com.pk/test/samples/test1.php");
$error = $client->getError();
if ($error) { echo "<h2>Constructor error</h2><pre>" . $error . "</pre>"; }
$result = $client->call("getProd", array("category" => "books"));
if ($client->fault) {
    echo "<h2>Fault</h2><pre>";
    print_r($result);
    echo "</pre>";
}
else {
    $error = $client->getError();
    if ($error) {
        echo "<h2>Error</h2><pre>" . $error . "</pre>";
    }
    else {
        echo "<h2>Books</h2><pre>";
        echo $result;
        echo "</pre>";
    }
}

现在转到另一个正在调用的链接。 （http://miuc.com.pk/test/samples/test1.php）

代码

require_once('../lib/nusoap.php');
function getProd($category) {
    if ($category == "books") {
        return join(",", array(
            "The WordPress Anthology",
            "Build Your Own Website the Right Way"));
    }
    else {
            return "No products listed under that category";
    }
}

$server = new soap_server();
$server->register("getProd");
$server->service($HTTP_RAW_POST_DATA);

现在运行http://mef.com.pk/test/samples/test.php

错误

  

HTTP错误：HTTP身份验证失败

请参见上面的代码。我尝试了许多更改，但仍收到错误。我非常感谢使用soap API从其他服务器获得的帮助。