Problem with Multi Virus

I suddenly have problem with my multi-Virus on 2 MK-II cards.
Strange problem I think... I can load 2 instances of virus i Cubase, but when I load the third I got it DISABLED.
I have updated the program from 4.4.150 to 4.4.3 but the problem is still there.
I uninstalled and installed the Multi-Virus again with no success.

PowerCore/PCI: msg:4000009(proc:0) result:8e000006(proc:0)

Hmm, found this in some file:
Virus PowerCore    No more instances of this Plug-In allowed.        Cubase VST

I don't know if I dare to remove license. I mean, is it still available to generate the pool-file?
Strange, I mean if I did not have multi-license I should only be able to load 1 instance but it fails when loading the third.