aspè lo posto con le correzioni...

la pagina col form del login ha due campi testo
nome="nick"
nome="password"
<?

$dbname="db.mdb";
$nick = $HTTP_POST_VARS["nick"] ;
$query="SELECT * FROM login where nick = '".$nick."'";
$connessione=new COM("ADODB.Connection");
$connessione->Open("DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=C:/Programmi/EasyPHP/www/login con php e access/$dbname");
$rs=$connessione->execute($query);
if (!$rs->EOF)
{
$campo1=$rs->fields("nick");
$campo2=$rs->fields("password");
$campo3=$rs->fields("email");
$user="$campo1->value";
$pass="$campo2->value";
$mail="$campo3->value";

}
$rs->close;
?>

<?
if(($nick !="$user") || ($password !="$pass"))
{
echo"<center>";
echo"<font face=\"verdana\" color=\"#000080\" size=\"1\">";
echo"[ USER NAME & PASSWORD ERRATI, RIPETERE IL LOGIN ]

";
echo"<meta http-equiv=refresh content=2;url=javaScript:history.back()>";
exit;
}
?>
<? include"form.php" ?>