Sonar Platinum forgetting Z3ta+2 envelopes

Whenever I open my project, all of the envelopes assigned to Z3ta+2 become orphaned.  The envelopes are still visible, but they are no longer assigned to the synth.  I installed everything using CCC, and my Sonar installation and VST folders are not on my C drive.  I've seen in another thread where it may be that Z3ta isn't installed correctly, but I don't understand what I can do differently given the way Command Center works.

My system is configured like this:

C: - Windows and system stuff
D: - Main recording drive
H: - Sonar, VSTs, Other Applications
K: - Third party Softsynth libraries