II's autenticating PHP ldap_connect

[GhostBuster]

Hi all Freaks !

Does anyone know if its possible to use
$r = ldap_bind($ds, $_SERVER["AUTH_USER"], $_SERVER["AUTH_PASSWORD"]); in a IIs server 6.0 on a Windows 2003 server.

When I connect to the page $_SERVER["AUTH_USER"] get me the correct user but $_SERVER["AUTH_PASSWORD"]) does not give me any value.

I have a secure SSL site and the user is online when I would like to do this, I dont want to get an another password request.
???