Install the latest version of the Syncrosoft drivers.
Also, what sound card are you using.
As for the VST version and Sonar, it doesn't work. The problem lies with Sonar's VST Adapter, and I have reproduced it with Sonar 4 PE, Sonar 5 PE, and Project 5 version 2.
I have used the VST version of the plug in Cubase, Live, Acid Pro 6, Tracktion, Energy XT, and V-Stack without incident.