scusatemi sono un neofita....la pagina mi da questo errore



Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /home/romaglor/public_html/engine/index2.php:2) in /home/romaglor/public_html/include/session.php on line 5

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/romaglor/public_html/engine/index2.php:2) in /home/romaglor/public_html/include/session.php on line 5




il file session.php contiene questo

<?

include('settings.php');

session_start();
$user=$_SESSION['nome'];
?>


che faccio.....vi prego in parole molto comprensibili e facili grazie mille