This is how I got it to work
1 remove power settings via app manager
2 go to the menu and click on deinstall kernel-power-flasher
3 reboot phone
4 open app manager disable extra-devel & extra testing
5 install power kernel (should be version 37)
6 reboot phone
7 install power settings
8 reboot phone
9 should now work

Like you I have spent hours trying to get this to work

If you are feeling brave open app manager & rein-able extra
& extra testing and update to the power kernel to version 40
then reboot
If it still works I would recommend following this guide and install
nitdroid again because it is easy & worth it!

Good luck

http://forum.nitdroid.com/index.php?topic=84.0