php зависает ssh2_scp_recv

#!/usr/bin/php
<?php
$connection = ssh2_connect("xxx.xxx.xx.xx", 22); 
if (!$connection) die('Connection failed');
if (ssh2_auth_pubkey_file($connection,'root','rsa/id_rsa.pub','rsa/id_rsa')) {
  echo "Public Key Authentication Successful";
} else {
  die('Public Key Authentication Failed');
}
$flg= ssh2_scp_recv($connection, '/root/config.php', '/var/www/config.conf');	
exit();
?>