[inne][MySQL][PHP]Problem z session_start Opcje

[s4fun]

a wiec mam taki problem

wywala mi taki blad w stronie :

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\xampp\htdocs\includes\config.php:2) in C:\xampp\htdocs\includes\config.php on line 23

a oto moj config

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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<?php
  define("url", "localhost");
  define("gamenaam", "a");
  define("slogan", "a");
  define("noreply_mail", "a@a.pl");
  define("contact_mail", "a@a.pl");
  define("database_server", "localhost");
  define("database_user", "root");
  define("database_pass", "");
  define("database_name", "gra");
 
 
 
  mysql_connect(database_server, database_user, database_pass) or die(mysql_error());
  mysql_select_db(database_name) or die(mysql_error());
 
  //Arrays
  $ranks        = array("ranga1", "ranga2", "ranga3");
  $steden       = array("miasto1", "miasto2");
  $familieranks = array("Lider", "ViceLider", "Gracz");
 
  session_start();
  if(empty($ajax)) {
    include("includes/inc.functions.php");
    include("includes/inc.required_queries.php");
  }
 
  if(isset($_SESSION['id'])) {
    $own = mysql_fetch_assoc(mysql_query("SELECT * FROM users WHERE id = '" . $_SESSION['id'] . "'"));
    if(time() - strtotime($own['online']) >= 900) {
      unset($_SESSION['id']);
    }
    if($own['vip'] <= 0) {
      usleep(600000);
    }
    if(empty($ajax)) {
      mysql_query("UPDATE users SET online = '" . get_global_date("Y-m-d H:i:s") . "', ip = '" . $_SERVER['REMOTE_ADDR'] . "' WHERE id = '" . $own['id'] . "'");
      mysql_query("UPDATE users SET rankvordering = rankvordering - '100', rank = rank + '1' WHERE rank < '9' AND rankvordering >= '100'");
    }
  }
 
  if(empty($ajax)) {
    mysql_query("UPDATE users SET rankvordering = rankvordering - '100', rank = rank + '1' WHERE rank < '" . (count($ranks) - 1) . "' AND rankvordering >= '100'");
  }
?>
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prosze o pomoc skrypt dziala tylko, ze w tle widac ten blad