Question : Windows 2003 DHCP server reporting status "Not connected"

I have a problem with a Windows 2003 R2 DHCP server.
The server suddenly stopped providing DHCP to clients, without any reason for this (no other DHCP servers have been added to the network, and no other servers are in the network).
When I open the management snap-in, it says status "Not Connected". When I click on the server name (server.SKOLE.local) it reports a green arrow and status **Active**, but no DHCP clients are being served...

This is the only server in the network, and all other hardware devices are OK (Switches etc.). Connection is OK using static IP's.

Any ideas? Below is the only trace of a problem, the error from Event Viewer:

- The DHCP/BINL service on the local machine, belonging to the Windows Administrative domain SKOLE.local, has determined that it is not authorized to start.  It has stopped servicing clients.  The following are some possible reasons for this:
- This machine is part of a directory service enterprise and is  not authorized in the same domain.  (See help on the DHCP Service  Management Tool for additional information).
- This machine cannot reach its directory service enterprise and  it has encountered another DHCP service on the network belonging to  a directory service enterprise on which the local machine is not authorized.
- Some unexpected network error occurred.

Answer : Windows 2003 DHCP server reporting status "Not connected"

Is firewall enabled on the server by any chance?

Mike