Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\AppServ\www\user\admin\logout.php:2) in C:\AppServ\www\user\admin\logout.php on line 5

Warning: Cannot modify header information - headers already sent by (output started at C:\AppServ\www\user\admin\logout.php:2) in C:\AppServ\www\user\admin\logout.php on line 9

<?
session_start();
session_destroy();
Header("Location: index.php");
?>