MapAdmin Login problem

[Álvaro Gutiérrez]

Hi.
I've installed the following configuration:
   
    - Windows 2000 server
    - Apache 2.0.54
    - PHP 5.0.5
    - mod_jk_1.2.4 - apache2.0.54.so
    - Tomcat5.5.15
    - MapServerEntrerprise

I've tested  http://localhost/MapServer/MapAgent/index.html. When I 
click over any link i'm asked for user and pass (Administrator , admin).
The problem begins when i try to login into the admin page: 
http://servername/MapServer/MapAdmin/Login.php . After login an error 
message appears:

*Fatal error*: Call to a member function GetSiteServerAddress() on a 
non-object in *C:\Archivos de 
programa\MapServerEnterprise\WebExtensions\MapAdmin\ServerManagement.php* 
on line *63*

What does it mean?, and, How can i solve this?, as because of this i can 
execute the package Sheboygan.mgp
Thanks