Longhorn S.: Can't establish NAP

Hello,

I'm using Longhorn Server #6001 from Technet.
I followed the step by step guide to establish a DHCP based Network Access
Protection.
I defined a connection request policy, network policies, health policies and
a system health valiator.
The requirements to be validated as healthy is none.
Every condition, even the non compliant ones, grant network access, so there
is NO way that NAP should stop a network access.

I configured NAP client side on Client1 and applied the NAP to the DHCP
Scope in DHCP console. From this moment on, there is no network traffic
possible, no preconfigured message at the client if network access is granted
or not, just no connection.

I'm I missing sth here?