Two Windows 7 64-Bit systems with different names and ip´s.
The system booted last is shown in ZCM the other isn´t.
The working agent gets the right zone the other one say´s ~unknown~.

First tried to reregister both machines with no success.
Tried to unregister and register both machines with no success too.
I even set up a new OS on one machine this led to similar symptoms.
Changed the ethernet-adapter on one Pc. Same as before.

Any ideas how to get both agents work the way they should?