problema al cerrar la sesion

[arcanisgk122]

buenos dias amigo, vengo por aquí debido a que no encuentro como solucionar o mejor dicho ni siquiera entiendo el por que del error

los errores son :

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /www/zxq.net/i/c/a/icaros/htdocs/php/close.php:2) in /www/zxq.net/i/c/a/icaros/htdocs/php/close.php on line 4

Warning: Cannot modify header information - headers already sent by (output started at /www/zxq.net/i/c/a/icaros/htdocs/php/close.php:2) in /www/zxq.net/i/c/a/icaros/htdocs/php/close.php on line 8

Warning: Cannot modify header information - headers already sent by (output started at /www/zxq.net/i/c/a/icaros/htdocs/php/close.php:2) in /www/zxq.net/i/c/a/icaros/htdocs/php/close.php on line 11

y este es el codigo utilisado:

Código PHP:

<!-- Cierre de Sesion -->
<?php
session_name('MI_SESION');
session_start();
$_SESSION = array();
if (ini_get("session.use_cookies")) {
$params = session_get_cookie_params();
setcookie(session_name(), '', time() - 60000, $params["path"], $params["domain"], $params["secure"], $params["httponly"]);
}
session_destroy();
header('Location: ../index.php');
?>