Sure, this is something we should make clear in the help file, not to run 2 receiver/listener scripts at the same time. Since there are troubles another posssibility would be to use the prpcd.py even from P3dO (I just renamed it for clarity purpose). But there's the problem of the secure and other version - 2 scripts left so the risk is still there.

Yarp - author of P3DO Organizer for Poser