Problems with mod_vhost_alias and PHP require

Hi,

I have this Apache server with mod_vhost_alias and set /home/pages/%0
as the VirtualDocumentRoot

In /home/pages/gamito.foo.com I have a index.php file. This generates
the http://gamito.foo.com URL.
Also, I have a /home/pages/fckeditor with FCKeditor. *This is not
defined as a subdomain in the DNS*

I need to include in my index.php the file /home/pages/fckeditor/fckeditor.php

I have:

@define('FCKEDITOR_BASE', dirname(__FILE__));
require FCKEDITOR_BASE . '/../fckeditor/fckeditor.php';

But no good, Apache says it can't find the file:

/home/pages/gamito.foo/fckeditor/fckeditor.php

So, there's a "gamito" hanging wrongly in the request.

How can I solve this ?

Any help woud be appreciated.

Warm Regards,
Mário Gamito