can’t start installing wordpress

hello!

i had problems from the early beginning with the wp installation,
i have done everything like the installation steps are showing.
i must mention that im installing it in localhost (wamp/www)
i made database with wordpress name
edited wp_config.php and changed it
to wordpress data base name
root(the user)
deleted the password ”(empty)
and left the localhost.
i hope some1 can help me , i really dont know where to start .
what i got when i pressed on the install.php file is this message:

ERROR: %s’), $error); ?>

‘.__(‘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 $weblog_title = isset($_POST[‘weblog_title’]) ? stripslashes($_POST[‘weblog_title’]) : ”; $admin_email = isset($_POST[‘admin_email’]) ? stripslashes($_POST[‘admin_email’]) : ”; $public = isset($_POST[‘blog_public’]) ? (int) $_POST[‘blog_public’] : 0; // check e-mail address $error = false; if (empty($admin_email)) { // TODO: poka-yoke display_setup_form( __(‘you must provide an e-mail address.’) ); $error = true; } else if (!is_email($admin_email)) { // TODO: poka-yoke display_setup_form( __(‘that isn’t a valid e-mail address. E-mail addresses look like: username@example.com’) ); $error = true; } if ( $error === false ) { $wpdb->show_errors(); $result = wp_install($weblog_title, ‘admin’, $admin_email, $public); extract($result, EXTR_SKIP); ?>

admin
‘. $password .’
‘; } echo ‘

‘. $password_message .’
‘; ?>