If the includes are being requested from the index page in the root folder, I would have expected the path to be:
<?php include "powercms/admin/Connections/localhost.php"; ?>
The '../../' puts the folder below even the root directory.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.