If it's anything like LightConverse - which Realizzer
was last time I used it - it needs active MA-net or a DMX stream to operate. onPC won't output either by itself. You need a piece of MA2 hardware that enables parameters, same as you would for doing an actual show.
The last version of MA2 that would stream MA-net without hardware was 2.8-something. I don't know why they changed, but my LC Unlimited dongle suddenly became a lot less useful.