SGS 0.604 Login Super Admin, any action --> anonymous

Hi,
Logged in as Super Admin, as can be seen in attached screen shot ADMIN0.
It shows sgwadmin as logged in and shows the "system" folder.
Clicking on "system" folder (or any other key, like Theme (any theme), changes the logged in party to "anonymous"
as can be seen in screen shot ANONY1. Also all admin folders are removed from folder tree view.

Thanks,
Easy

General information:
- Simple Groupware version - 0.604
- Simple Groupware language - English
About Your environment:
- Server platform + Version - Windows XP, SP3
- Used webbrowser - Firefox 3.6
Parts of XAMPP 1.73
- Web-server platform + Version - Apache 2.2.14
- Database + Version - MySQL 5.1
- PHP Version - 5.3.1
About You:
- Your e-mail address - ibaumel@hotmail.com
- Your role - Developer