Dopo un inserimento nel DB vorrei fare un refresh, ma mi da questo errore!
Perchè?


<?
require ("../../connessione.php");
$sql = "INSERT into tbl_cale (id,day,mon,year,pre,id_pro) values ( '','".$day."','".$mon."','".$year."','Y','".$id_pr o."')";

mysql_db_query( $database, $sql, $db) or die(mysql_error());
header ("refresh:1 url=prenota.php");
?>

Warning: Cannot add header information - headers already sent by (output started at c:\programmi\easyphp\www\sfb\connessione.php:26) in c:\programmi\easyphp\www\sfb\office\admin_office\g o_prenota.php on line 6


Grazie!!!