setting radio button in non-Auto applicationproblem

[Art]

I'm new to AutoIt3. I'm trying to click a button in an existing (non-AutoIt) application, igfxcfg.exe. The first part of the script is shown below. Using the AutoIt Info tool, I was able to get the information for the control which is a radio button - that information is shown in thI ControlClick call below. All I want to do is set that radio button. After compiling into an exe and executing it, the igfxcfg.exe comes up correctly but there is no clicking of the radio button - I see no activity at all. The other part of the script (not shown) can successfully click on buttons which are not radio buttons. Can someone please answer why I'm not able to click on the radio button.

Thanks,

Art

#cs ----------------------------------------------------------------------------

AutoIt Version: 3.3.0.0

Author: myName

Script Function:

Template AutoIt script.

#ce ----------------------------------------------------------------------------

; Script Start - Add your code below here

run ("igfxcfg.exe")

;WinWaitActive("Intel® Graphics Media Accelerator Driver for Mobile")

ControlClick("Intel® Graphics Media Accelerator Driver for Mobile", "", "[CLASS:button; INSTANCE:17]","left",1, 6, 9)

[Zedna]

Look at ControlCommand() --> "Check"