Well It sees the Server now Mbelsten but now it says when I try to connect that I need to enable Anticheat and I have no idea how to do that through the ModLauncher.
So - initially you would have a copy of the game through the mod launcher then added darkness falls mod. Did your Vanilla install of 7dtd have EAC enabled or disabled?
If it was disabled you probably need to redo it ensuring it is enabled.
Sorry to be vague - not seen that problem before so unsure how to fix it... I know in the serverconfig.xml file you can set it to true or false - but that just might be for when you start a sp game rather than going into a server.....