Unable to install

Sorry, I feel lost and would be very grateful for any help.

Windows XP professional sevice pack 3
MySQL version 5.1.40 community
PHP is the latest version (downloaded yesterday)
Using IIS

I have been following the instalation guide but  when i get to step 2

Enter your_url/account (or whatever directory you entered). This will run the install wizard if this is the first time you run FrontAccounting, setup a drill company and optional populating with initial demo data.

I am entering into Internet Explorer  http://localhost/account/ but all this gives me is a listing of the folder.  I have tried clicking index.php but this gives me the following:
<?php
/**********************************************************************
    Copyright (C) FrontAccounting, LLC.
    Released under the terms of the GNU General Public License, GPL,
    as published by the Free Software Foundation, either version 3
    of the License, or (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
    See the License here <http://www.gnu.org/licenses/gpl-3.0.html>.
***********************************************************************/
    $path_to_root=".";
    if (!file_exists($path_to_root.'/config.php'))
        header("Location: ".$path_to_root."/install/index.php");

    $page_security = 'SA_OPEN';
    ini_set('xdebug.auto_trace',1);
    include_once("includes/session.inc");

    add_access_extensions();
    $app = &$_SESSION["App"];
    if (isset($_GET['application']))
        $app->selected_application = $_GET['application'];

    $app->display();
?>