Note that, on Windows, due to a bug in the php_ldap extension for php 5.3.2, the location of the ldap.conf may change.
In this case, PHP expects the ldap.conf file to be in the root filesystem where the Webserver Document root is installed (for instance C:\ldap.conf).
This seems to be fixed in PHP 5.3.3RC1
See the following bug reference:
http://bugs.php.net/bug.php?id=48866