Just a reminder:
 
Make sure you have the 8.3 (short) naming ENabled in your Windows for Sonar X1 and X2. Otherwise your plug-ins may not show up correctly in the VST list.
 
Please refer to THIS for further info.
 
PS. This should be included in the Sonar system requirement list or something.

I recommend that you submit this as a feature request to Cakewalk.  That is where they like to get requests for documentation changes.

Bob Bone