I don't know what happen to my configuration. Can you please enlighten me on how fix this error.

[06-Feb-2011 13:25:22] 0:admin:po_ui.inc:2: include_once(..../purchasing/includes/purchasing_db.inc) [<a href='function.include-once'>function.include-once</a>]: failed to open stream: No such file or directory

[06-Feb-2011 13:25:22] 0:admin:po_ui.inc:2: include_once() [<a href='function.include'>function.include</a>]: Failed opening '..../purchasing/includes/purchasing_db.inc' for inclusion (include_path='.;C:\xampp\php\PEAR')

Thanks