OCS Server has no machines in database

Hi,

Im currently Running an OCS server 2.3 on Debian 8 Jessy ,

I have to make it communicate with an agent (also 2.3) running on win 7 pro.

The server is properly set-up and I can acces it from an external pc on the same network but when I lunch the agent on windows , I get nothing on the server : (0 machines in Database)

I really deseperate and can't get it to work even by following every troubleshooting steps on internet .

I'd really apreciate some help ,

thanks.