Although the ZUMO is not in the Shields Test Report, you may find the PWM components useful in shedding some light.
The Shields Test Report also contains example sketches for many of the components.
thank you for the clue, Deium! It solved my problem.
The ZUMO started working. All, I had to move was to add following statement in the setup() and set the swizzler, appropriately.
setPwmSwizzler(x, x, 10, 9);
Now I can move on to sensor side of ZUMO. Thank you, again for the quick and prompt support!