- Did you change port to 2238 on client (or maybe you changed it in FOnlineServer.cfg)?
- Do you have master.dat and critter.dat in client directory?
Address is localhost and port is 4000
Dats are in the right location and the client is reading them.
Found it out, FOnlineServer.cfg was set to listen on port 2238, changed it to 4000 and it works