Additional DPs with Visualizer

I have a rig that uses 35 Universes in LightConverse, and I'm trying to make the extra DPs Ive added function using Hog4PC. All virtual no real hardware here. The first DP works fine and has a status of Found/Running, but the other 2 I've added cannot be found and are offline. I've tried assigning IPs to them, but this hasnt worked. How do I make these virtual DPs functional?