Ошибка первой интеграции шлюза оплаты данных ошибка soap

Привет, я пытаюсь интегрировать интеграцию первого платежного шлюза данных в метод запроса soap с использованием php. Я загрузил рабочий образец кода из первых данных, но когда я пытаюсь отправить платеж с помощью предоставленного ими образца кода, он выдает мне ошибку.

Весь php-код

<?php


class SoapClientHMAC extends SoapClient {
  public function __doRequest($request, $location, $action, $version, $one_way = NULL) {
    global $context;
    $hmackey = "***********************"; // <-- Insert your HMAC key here
    $keyid = "*****"; // <-- Insert the Key ID here
    $hashtime = date("c");
    $hashstr = "POST\ntext/xml; charset=utf-8\n" . sha1($request) . "\n" . $hashtime . "\n" . parse_url($location,PHP_URL_PATH);
    $authstr = base64_encode(hash_hmac("sha1",$hashstr,$hmackey,TRUE));
    if (version_compare(PHP_VERSION, '5.3.11') == -1) {
        ini_set("user_agent", "PHP-SOAP/" . PHP_VERSION . "\r\nAuthorization: GGE4_API " . $keyid . ":" . $authstr . "\r\nx-gge4-date: " . $hashtime . "\r\nx-gge4-content-sha1: " . sha1($request));
    } else {
        stream_context_set_option($context,array("http" => array("header" => "authorization: GGE4_API " . $keyid . ":" . $authstr . "\r\nx-gge4-date: " . $hashtime . "\r\nx-gge4-content-sha1: " . sha1($request))));
    }
    return parent::__doRequest($request, $location, $action, $version, $one_way);
  }

  public function SoapClientHMAC($wsdl, $options = NULL) {
    global $context;
    $context = stream_context_create();
    $options['stream_context'] = $context;
    return parent::SoapClient($wsdl, $options);
  }
}

$trxnProperties = array(
  "User_Name"=>"",
  "Secure_AuthResult"=>"",
  "Ecommerce_Flag"=>"",
  "XID"=>"",
  "ExactID"=>$_POST["ddlPOS_ExactID"],                  //Payment Gateway
  "CAVV"=>"",
  "Password"=>"********",                                   //Gateway Password
  "CAVV_Algorithm"=>"",
  "Transaction_Type"=>$_POST["ddlPOS_Transaction_Type"],//Transaction Code I.E. Purchase="00" Pre-Authorization="01" etc.
  "Reference_No"=>$_POST["tbPOS_Reference_No"],
  "Customer_Ref"=>$_POST["tbPOS_Customer_Ref"],
  "Reference_3"=>$_POST["tbPOS_Reference_3"],
  "Client_IP"=>"",                                      //This value is only used for fraud investigation.
  "Client_Email"=>$_POST["tb_Client_Email"],            //This value is only used for fraud investigation.
  "Language"=>$_POST["ddlPOS_Language"],                //English="en" French="fr"
  "Card_Number"=>$_POST["tbPOS_Card_Number"],           //For Testing, Use Test#s VISA="4111111111111111" MasterCard="5500000000000004" etc.
  "Expiry_Date"=>$_POST["ddlPOS_Expiry_Date_Month"] . $_POST["ddlPOS_Expiry_Date_Year"],//This value should be in the format MM/YY.
  "CardHoldersName"=>$_POST["tbPOS_CardHoldersName"],
  "Track1"=>"",
  "Track2"=>"",
  "Authorization_Num"=>$_POST["tbPOS_Authorization_Num"],
  "Transaction_Tag"=>$_POST["tbPOS_Transaction_Tag"],
  "DollarAmount"=>$_POST["tbPOS_DollarAmount"],
  "VerificationStr1"=>$_POST["tbPOS_VerificationStr1"],
  "VerificationStr2"=>"",
  "CVD_Presence_Ind"=>"",
  "Secure_AuthRequired"=>"",
  "Currency"=>"",
  "PartialRedemption"=>"",

  // Level 2 fields 
  "ZipCode"=>$_POST["tbPOS_ZipCode"],
  "Tax1Amount"=>$_POST["tbPOS_Tax1Amount"],
  "Tax1Number"=>$_POST["tbPOS_Tax1Number"],
  "Tax2Amount"=>$_POST["tbPOS_Tax2Amount"],
  "Tax2Number"=>$_POST["tbPOS_Tax2Number"],

  //"SurchargeAmount"=>$_POST["tbPOS_SurchargeAmount"], //Used for debit transactions only
  //"PAN"=>$_POST["tbPOS_PAN"]                          //Used for debit transactions only
  );


$client = new SoapClientHMAC("https://api.demo.globalgatewaye4.firstdata.com/transaction/v12/wsdl");
$trxnResult = $client->SendAndCommit($trxnProperties);


if(@$client->fault){
    // there was a fault, inform
    print "<B>FAULT:  Code: {$client->faultcode} <BR />";
    print "String: {$client->faultstring} </B>";
    $trxnResult["CTR"] = "There was an error while processing. No TRANSACTION DATA IN CTR!";
}
//Uncomment the following commented code to display the full results.

echo "<H3><U>Transaction Properties BEFORE Processing</U></H3>";
echo "<TABLE border='0'>\n";
echo " <TR><TD><B>Property</B></TD><TD><B>Value</B></TD></TR>\n";
foreach($trxnProperties as $key=>$value){
    echo " <TR><TD>$key</TD><TD>:$value</TD></TR>\n";
}
echo "</TABLE>\n";

echo "<H3><U>Transaction Properties AFTER Processing</U></H3>";
echo "<TABLE border='0'>\n";
echo " <TR><TD><B>Property</B></TD><TD><B>Value</B></TD></TR>\n";
foreach($trxnResult as $key=>$value){
    $value = nl2br($value);
    echo " <TR><TD valign='top'>$key</TD><TD>:$value</TD></TR>\n";
}
echo "</TABLE>\n";


// kill object
unset($client);
?>

Когда я отправляю платеж, на моей странице появляется этот конкретный код, и он выдает ошибку

 Fatal error: Uncaught SoapFault exception: [HTTP] in C:\wamp\www\Fd\php\process.php:49 Stack trace: #0 C:\wamp\www\Fd\php\process.php(49): SoapClient->__doRequest('<?xml version="...', 'https://api.dem...', 'http://secure2....', 1, 0) #1 [internal function]: SoapClientHMAC->__doRequest('<?xml version="...', 'https://api.dem...', 'http://secure2....', 1, 0) #2 C:\wamp\www\Fd\php\process.php(104): SoapClient->__call('SendAndCommit', Array) #3 C:\wamp\www\Fd\php\process.php(104): SoapClientHMAC->SendAndCommit(Array) #4 {main} thrown in C:\wamp\www\Fd\php\process.php on line 48.

А строка 48 - это

return parent::__doRequest($request, $location, $action, $version, $one_way);

Я действительно не мог понять выясните, в чем заключается эта ошибка. Гуглил и пробовал различные решения, но безуспешно.Кроме того, на моем php-сервере включены soap и openssl, если это может помочь.

Заранее спасибо за любую помощь.