UPDATE & SET

[Johurt]

<?php
require_once('mokejimai_webtopay.php');
include "config.php";

try
{
     $response = WebToPay::checkResponse($_GET, array(
          'projectid' => *****,
          'sign_password' => ''.$passwordas.'',
     ));

     $kns = ($_GET['wp_amount']);
     $ex1 = ($_GET['wp_sms']);
     $ex = explode(' ', $ex1);

     if(empty($ex[1]))
     {
          echo $ok."Jus neivedete ID!";
          exit();
     }
     echo "OK Nusipirkote 6 kreditus Dogberry.lt projekte.";
     mysql_query('UPDATE players SET Balansas=Balansas+6 WHERE ID=\''.$ex[1].'\' LIMIT 1');
     $file = 'logai.txt';
     $current = file_get_contents($file);

     $current = "Nupirko 6 kreditus id: ".$ex[1]."";
     file_put_contents($file, $current);
}


catch (Exception $e) {
     echo get_class($e).': '.$e->getMessage();
}
?>

Код не работает, в чем проблема? С mokejimai_webtopay.php и config.php все нормально.