ftp error

[dreamwest]

Im getting this error message randomly 1 in 6 times itll lag and eventually show this error when i try to upload an image to a remote server.

 

Warning: ftp_put() [function.ftp-put]: php_connect_nonb() failed: Operation now in progress (115) in /home/user/public_html/2.php on line 22

Warning: ftp_put() [function.ftp-put]: Type set to I in /home/user/public_html/2.php on line 22

 

Script:

$ftp_server = "";
$ftp_user   = "";
$ftp_pass   = "";

// connect to target ftp server
$target_conn = ftp_connect($ftp_server) or die("Could not connect to server try again!");

if(ftp_login($target_conn, $ftp_user, $ftp_pass)){
   echo 'Success';
}else{
   echo 'Failed or timed out';
}

// switch to passive mode if behind a firewall - REMOVE THIS IF YOU RUN INTO PROBLEMS
ftp_pasv($target_conn, true );

// change to the target path
    ftp_chdir($target_conn, '/1/');

// upload the thumbnail
ftp_put($target_conn, 'test.jpg', 'tmb_4.jpg', FTP_BINARY) or die("There was an error uploading the thumbnail. Please try again");

   	ftp_close($target_conn);
   	
echo "<hr>All done!";

 

Anyone know what the error means?