The usage of the ProjectCenter & Gorm on the Debian Sarge

Hello!

I'm new on this list and new to the ProjectCenter & Gorm.
I just install both on my Debian Sarge system:
ProjectCenter 0.4.0
Gorm 0.9.2

I red the tutorials:
http://www.gnustep.it/pierre-yves/index.html
http://mediawiki.gnustep.org/index.php/Gorm_Manual#Guide_to_the_Gorm_application

and try to create the Converter.app but with no success.

I create the new Project "Converter" in the ProjectCenter.
Then I try to open Gorm with no success by double clicking on 
Interfaces/Converter.gorm. After that I realise that this is only a 
directory, not a file.

Please tell me how can work together the ProjectCenter and Gorm?

-- 
Regards,
Paul 
->->-> Debian Junior Project :-) :-) :-) :-) :-) :-) :-) :-) :-)