register globals = off igen

Hvorfor vil den ikke hente data fra config.php

----------config.php
<?php
$Host = 'localhost';
$Username = 'root';
$Password = '0087';
$Database = 'projekt0005';
?>
når fil test.php ser sådan ud

<?php
include("config.php");
mysql_connect("$Host","$Username","$Password");
mysql_select_db("database");