Cakewalk V-Studio 100 and Sonar Platinum

I have a Cakewalk V-Studio 100 and everything is working in the latest Sonar Platinum.

I use a 24" touch screen with Sonar and I want to "touch" the screen to select the track fader (rather than scrolling through tracks using the V-Studio 100 TRACK arrow buttons).  
 
How do I configure Sonar to use the touch screen to select a fader on screen so the V-Studio 100 motorized fader operates on that track?
 
Thanks,
Steve