problém s přihlášením

Warning: mysql_connect() [function.mysql-connect]: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) in /home/free/ic.cz/k/kvinta-gfxs/root/www/include/fce.php on line 12
CHYBA - nepripojeno: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

include("include/fce.php");
include("include/config.php");

$action = $_GET['action'];
switch($action){
     case check:
         $username = $_POST['username'];
         $password = $_POST['password'];
         $ok = $_POST['ok'];

         if ($ok) {

             
             connect();
             
// WHERE `username` = '$username' AND `password` = '$password'


     $sql = mysql_query( "SELECT * FROM `users`");
    while($record=mysql_fetch_array($sql)){
        
        echo $record=username;
        
    }




         }


         break;