NVIDIA GameWorks Integration

Hi!
I have a problem with HBAO+. I set the r.hbao.enable 1 in ConsoleVariables.ini, enable HBAO+ in the post-processing volume and I can’t notice any change in the look of my scene! Even in playmode. Normal AO gives a noticable effect whereas I can’t get anything out of HBAO+ even with intensity. I have the 4.9.1 nVidia Techs build. VXGI and Hairworks work fine.