Can't establish a L2TP VPN connection Windows Server 2008 R2 SP1

I get this error:

Client’s Windows Logs:
CoId={A4E060DB-D844-0004-79A0-EBA444D8D601}: The user SYSTEM dialed a connection named NSD-SERVER which has failed. The error code returned on failure is 809.

On the server, there is no log in Event Viewer.

With PPTP it works.
I’ve tried everything I could find on the internet and nothing worked with L2TP, I don’t know what else to try.
IKE and AuthIP… and IPsec Policy Agent services are running.
All firewalls are disabled, all ports are forwarded and the server set to DMZ.
User is set to allow remote connection under Dial-up and also added to the "Remote Desktop Users" group.
Can it be to the router, must the router be capable of something for L2TP?

Network Policy Server is set like this:

I’ve also set this to registry:

Routing and Remote Access settings: