RT Distributed Rendering not working

Hey guys!
When using V-Ray Adv all of my render nodes work fine, but switching to V-Ray RT 3.50.04 none of my rendernodes are rendering (neither cpu nor gpu), only the host is. Error: Render host xxx disconnected.
I’m on 3ds max 2017. I have tried it several times, restarting all PCs, but nothing helped. Could you help me?
OS: Windows 10 creators update

Regards
Olaf

You are starting RT render server on the render nodes, right? Not DR spawner?

Ups, yes, starting RT render server definitely solved my problem. Thanks.