Install/Login Problem

[onlytest]

Hy there,
please help me in english or german language.

I succesfully installed arfooo and the screen said >
" Success!
Arfooo Directory has been installed successfully. You can now logIn and manage your directory."

After I clicked to the login button the screen said >

" /katalog/index.php/admin/
http://onlytest.cwsurf.de/katalog/install/step6.php
(8) Undefined index: host FrontController.php line 87 15-8-10 0:25

FrontController->getInstance() # line 16, file: /home/www/cwcity/hosting/o/n/onlytest/htdocs/katalog/index.php
FrontController->__construct() # line 37, file: /home/www/cwcity/hosting/o/n/onlytest/htdocs/katalog/core/FrontController.php
FrontController->loadSettings() # line 51, file: /home/www/cwcity/hosting/o/n/onlytest/htdocs/katalog/core/FrontController.php "


I cant do anything! Cant login!

What I have to do now?

thanks

[onlytest]

Update:
I installed Arfooo under 3 different servers right now. Its always the same! Maybe arfooo want to fool me?

Maybe anybody can install it for me? Or please help at this thread...soon please...

thx