Ftp Script Problems - Authentication Failure

if (!ftp_login($ftpcon1, $username1, $password1)) }
   print "Could not login to remote host</BODY></HTML>";
}

function ftp_parse_response($response, &$errstr) {
  if(!is_array($response)) {
      $errstr    = 'Parameter \$response must be an array';
      return false;
  }
     
  foreach($response as $r) {
      $code    = substr(trim($r),0,3);

      if(!is_numeric($code)) {
          $errstr    = "$code is not a valid FTP code",$code);
      }
         
      if($code > 400) {
          $errstr    = $r;
          return false;
      }
  }
     
  return true;
}

$user = "user";
$pass = "password";
$host = "ftp.example.com";
$proxyuser = "proxyuser";
$proxypass = "proxypass";
$proxyhost = "ftp.proxy.com";

$conn_id = ftp_connect($proxyhost);

if(!$conn_id) {
  die("cannot connect to proxy");
}

$commands  = array(
  "USER ".$user."@".$host." ".$proxyuser,
  "PASS ".$pass,
  "PASS ".$proxypass
);

foreach($commands as $c) {
  $ret    = ftp_raw($conn_id,$c);

  //you can write your own ftp_parse_response func that
  //use an array of string as input
  if(!ftp_parse_response($ret,$errstr)) {
      ftp_close($conn_id);
      die("cannot login to $host");
  }
}

echo "ok, now connected";