ATK Package: Backlight not enabling

Registration date
Wednesday July 15, 2015
Last seen
July 15, 2015
I am using ASUS G75VX with windows 8.1 pro OS. I tried installing different ATK packages for fixing the keyboard backlight, but it is not working at all.
The fun+f3 works (that is for lowering the backlight intensity, the notification pops up for that) but fn+f4 do not work. The backlight blinks in during the bootup and turns off while entering to windows. (is there a way to completely uninstall ATK package or any other method to get this back?)

It would be really great if you can find me a solution with your expertise in this area. Thanks a lot!