Install.php in IIS6.0 displaying php tags

I am having an issue getting WP installed on my PC. I’m using Vista Ultimate with IIS 6.0, PHP 5.2.8, and MySQL 5.1.

When I attempt to run install.php, I receive the following:

>
WordPress
'.__('Already Installed').'

'.__('You appear to have already installed WordPress. To reinstall please clear your old database tables first.').'
');} switch($step) { case 0: case 1: // in case people are directly linking to this display_header(); ?>

ReadMe documentation at your leisure. Otherwise, just fill in the information below and you\'ll be on your way to using the most extendable and powerful personal publishing platform in the world.'), '../readme.html'); ?>

error) ) wp_die($wpdb->error->get_error_message()); display_header(); // Fill in the data we gathered $weblog_title = stripslashes($_POST['weblog_title']); $admin_email = stripslashes($_POST['admin_email']); $public = (int) $_POST['blog_public']; // check e-mail address if (empty($admin_email)) { // TODO: poka-yoke die('

'.__("ERROR: you must provide an e-mail address.").'
'); } else if (!is_email($admin_email)) { // TODO: poka-yoke die('

'.__('ERROR: that isn’t a valid e-mail address. E-mail addresses look like: username@example.com').'
'); } $wpdb->show_errors(); $result = wp_install($weblog_title, 'admin', $admin_email, $public); extract($result, EXTR_SKIP); ?>

	admin

'.__('Note that password carefully! It is a random password that was generated just for you.').''; ?>

I have updated the config file and ensured database connectivity. Also note that I am able to successfully run 2 large PHP applications I built for my company without any issues whatsoever. That being said, it is not a case of “You don’t have PHP installed!” or “PHP isn’t configured correctly!”

I am a professional web developer and administrator of 4 public webservers where I work. I have been through every step I could think of to resolve this. I’ve seen this issue posted in other places on these forums, but have yet to see a solution.