Port 1 needs to be changed to something else besides 5020. (that little note at the bottom of the Nework Rendering pane on your screenshot) 5025, 5030 etc. The others can stay as shown Also, since I've got some other devices on the network that dynamically grab the 192.... IP addresses I've changed them all to manual "locking" the last digit preventing another device from grabbing the address and messing with the Carrara network. You may not have this issue though. I'm running several nodes with no problems.