HELP Already installed message

‘.__(‘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
I keep getting this message and this is the first time I installed this.This has been puzzling me for days.Help Please