When i tried this
http://localhost/security/xamppsecurity.php to setup a simple login and password
to block the //localhost/phpmyadmin
You don't have permission to access the requested object. It is either read-protected or not readable by the server.
If you think this is a server error, please contact the webmaster.
Apache/2.2.11 (Win32) DAV/2 mod_ssl/2.2.11 OpenSSL/0.9.8i mod_autoindex_color PHP/5.2.8 mod_perl/2.0.4 Perl/v5.10.0