来自 php 的 .Net Soap WSDL Web 服务调用没有响应

我遇到了使用 nusoap.php 库通过 php 调用品牌银行网络服务的问题。 我必须从他们公开的Brandbank网络服务中获取数据 https://www.i-label.net/partners/webservices/datafeedbasic/extractdata.asmx?WSDL我使用 nusoap.php 库在 php 中制作了我的代码，但出现错误

我的代码

require_once "nusoap.php";
$client = new nusoap_client("https://www.i-label.net/partners/webservices/datafeedbasic/extractdata.asmx?WSDL");
$error = $client->getError();
if ($error) {
    echo "<h2>Constructor error</h2><pre>" . $error . "</pre>";
}
$param = array('ExternalCallerId'=>' 32 char     key ','GTIN'=>'04015400440819','Description'=>'TAMPAX BLUE BOX MINI 20s','OwnLabel'=>'false','Category'=>'HHB','HasImage'=>'false');
$client->setUseCurl(true);
$client->soap_defencoding = 'UTF-8';
$result = $client->call("GetUnsentProductData", $param);
if ($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>Products Info</h2><pre>";
    echo $result;
    echo "</pre>";
}

}

这是网络服务的响应

Array
(
    [faultcode] => soap:Server
    [faultstring] => Server was unable to process request. ---> An exception has occured whilst processing your request. The details have been logged, and the system administrator has been notified
    [detail] => 
)

Brandbank WSDL 链接： https://www.i-label.net/partners/webservices/datafeedbasic/extractdata.asmx?WSDL我面临的问题是我不知道如何通过此肥皂调用向他们发送参数中的产品列表。