NTLM authentication with IIS and latest IE

[Bruce Lewis]

I've gotten NTLM authentication working with PHP 5.0.2 and IIS 5.0, so
long as I use Internet Explorer 6.0.2800. Using IE 6.0.2900
authentication doesn't happen. IE displays a "Cannot find Server or
DNS Error" page ("friendly HTTP message") or just hangs. Anybody know a
workaround? Here's the current incarnation of my code:

if (!$_SERVER['REMOTE_USER'] && !$_SERVER['AUTH_USER'] && !$_SERVER['LOGON_USER'])
{
header('HTTP/1.0 401 Authorization Required');
/*
header('WWW-Authenticate: Negotiate');
header('WWW-Authenticate: NTLM');
header('X-Test-Header: Am I seeing double?');
*/
echo 'This page requires EVNT authentication' ;
exit;
}


(EVNT refers to the realm I'm trying to authenticate.)

Any ideas what I can do to make NTLM work with all versions of IE?