Non funziona il delete, dove il problema?

CONFIG.PHP

$db_host = "#";
$db_user = "#";
$db_password = "#";
$db_name = "#";

$db = mysql_connect($db_host, $db_user, $db_password);
$db_forum = mysql_select_db($db_name, $db);

CANCELLA.PHP

include("config.php");

$query="DELETE * FROM tabella WHERE (id = '$id')";

$query_results = mysql_query($query, $db);