opensuse 13.1 won't go to sleep on low battery

For some reason I cant make “opensuse 13.1 KDE” go to sleep mode when it’s low on battery but continue working till battery drain and shutdown. :’(

I tried to do set it in *System settings * but it don’t follow,

for example:
I set up it go to sleep when battery hits 30% but it continuous working till battery die…

Please help!