Openfire with jappix : pb manager

Hi,

when i connect to http://myserver:7070/jappix/?m=manager

I have a blank page, the manager does'nt works

I edit the main-page.php and i change define('manager_link', 'on');   I have now the link to manage jappix but it does'nt works

Have you an idea ?

Si vous répondez en français, en belge, en québequois je n'y vois aucun inconvénient...

Thanks