i have downloaded Swift Mailer from their website and try to send simple email with following code

     <?php
     require_once 'lib/swift_required.php';

    $transport = Swift_SmtpTransport::newInstance('smtp.example.org', 25)
    ->setUsername('your username')
     ->setPassword('your password')
      ;


    $mailer = Swift_Mailer::newInstance($transport);

  //Create a message
  $message = Swift_Message::newInstance('Wonderful Subject')
  ->setFrom(array('[email protected]' => 'John Doe'))
 ->setTo(array('[email protected]', '[email protected]' => 'A name'))
 ->setBody('Here is the message itself')
 ;

 //Send the message
 $result = $mailer->send($message);

?>

once i run the page it gives error

      Warning: fsockopen() [function.fsockopen]: php_network_getaddresses: getaddrinfo failed: No such host is known. in E:\web_sites\swift_mail\lib\classes\Swift\Transport\StreamBuffer.php  on line 233

    Warning: fsockopen() [function.fsockopen]: unable to connect to smtp.fiveocean.net:25 (php_network_getaddresses: getaddrinfo failed: No such host is known. ) in E:\web_sites\swift_mail\lib\classes\Swift\Transport\StreamBuffer.php on line 233

   Fatal error: Uncaught exception 'Swift_TransportException' with message 'Connection could not be established with host smtp.fiveocean.net [php_network_getaddresses: getaddrinfo failed: No such host is known. #0]' in E:\web_sites\swift_mail\lib\classes\Swift\Transport\StreamBuffer.php:235 Stack trace: #0 E:\web_sites\swift_mail\lib\classes\Swift\Transport\StreamBuffer.php(70): Swift_Transport_StreamBuffer->_establishSocketConnection() #1 E:\web_sites\swift_mail\lib\classes\Swift\Transport\AbstractSmtpTransport.php(101): Swift_Transport_StreamBuffer->initialize(Array) #2 E:\web_sites\swift_mail\lib\classes\Swift\Mailer.php(74): Swift_Transport_AbstractSmtpTransport->start() #3 E:\web_sites\swift_mail\test.php(33): Swift_Mailer->send(Object(Swift_Message)) #4 {main} thrown in E:\web_sites\swift_mail\lib\classes\Swift\Transport\StreamBuffer.php on line 235

if i remove the line

  $result = $mailer->send($message);

then page execute and no error message display, as soon as i add above line to send email, i got error.

my outgoing server, port and user id & passwords are correct in my file.

Thanks