Win7: Server unable to distiguish clients

For our digital signage system we needed four new clients. To avoid different configurations I installed one system (Windows 7 with Xibo 1.7.4) and cloned the drive to the other systems.

Now when I connect any of these clients to the server it is not able to distinguish them. After one of them was licenensed, the others needed no further license. Thus they all get the same content.

So, I changed the names of the three others,
each one has got a different IP address and a different MAC,
entered a different name in XiboClient.config.xml -> DisplayName
even uninstalled the Xibo client software, deleted each and every file left by the installation (sure thing: Also every file in C:\Users…\AppData\Roaming\Xibo as well as in C:\Users\Documents\Xibo Library), restarted and reinstalled. Still the server considers each of the four clients to be the very same client.

So how do I need to set up each client so that the server is able to distinguish them?

Regards,
Markus

You will want to open Options on each player and adjust the Display ID on advanced tab (it must be unique) after that CMS should see 4 separate players.

Thanks a lot and sorry for missing that post in my search.