There is an open issue where some of the VST 3 versions of some components in the Arturia V Collection do NOT work in Sonar X3e.
The workaround for the moment is to remove the VST 3 versions and use the VST 2 versions instead. This does not affect the sound, by the way.
I also do not know if your current issue is related to the one I point out above - just giving you what is known at the moment.
I have the V Collection as well, LOVE IT, and am also using the above workaround to be able to use all of the components.
Hope that helps,
Bob Bone