Hi David,
Thanks for the response. You're right. Command Groups are problematic. So are Option Groups for the same exact reasons. I was able to solve the problem by simply adding the following code to the CLICK event of each button:

WITH THIS
.VALUE = n && Where 'n' is the button number
.PARENT.CLICK()
ENDWITH

Too bad the control can't be manipulated as desired without this code.

Rich