Error "empty XML request" as POST request via curl (PHP)

I have created xml request and recieve error message as respond from service: Empty XML request. Service works well as I have configured other system at it. And I don't see any different beside first system uses "wp_remote_post" instead of curl.

My code is:

<?php

    $x1=360;
    $x2="990";

    $data = array(
                    'xml' => array(
                            'new_order' => array(
                                'x1' => $x1,
                                'x2' => $x2
                            )
                        )
                    );  


//create XML 
            $doc = new DOMDocument('1.0','utf-8');
            $doc->formatOutput = true;

            foreach($data['xml'] as $key1 => $value1)
            {
                $node1 = $doc->createElement($key1);
                $doc->appendChild($node1);
                foreach($value1 as $key2 => $value2)
                {
                    $node2 = $doc->createElement($key2, $value2);
                    $node1->appendChild($node2);
                }
            }

            $data['xml']= $doc->saveXML();


//***END XML 

//SEND XML 



$url = "--HTTPS ADDRESS IS CORRECT--";

$headers = array(
    "Content-type: text/xml;charset=\"utf-8\"",
    "Accept: text/xml",
    "Cache-Control: no-cache",
    "Pragma: no-cache",
    "SOAPAction: \"run\""
 );

$xmlRequest = $data['xml'];


        try{
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_POST, 1);

            // send xml request to a server

           curl_setopt ($ch, CURLOPT_SSL_VERIFYHOST, 0);
           curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, 0);

            curl_setopt($ch, CURLOPT_POSTFIELDS,  $xmlRequest);

            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

           curl_setopt($ch, CURLOPT_VERBOSE, 0);
           curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

            $connect = curl_exec($ch);

             //convert the XML result into array
            if($connect === false){
                $error = curl_error($ch);
                echo $error; 
                die('error occured');
            }else{

                $connect = json_decode(json_encode(simplexml_load_string($connect)), true);  
            }
            curl_close($ch);

        }catch(Exception  $e){
            echo 'Message: ' .$e->getMessage();die("Error");
    }



//***END SEND XML 


?>