Kinect V2 - OpenNi2

Installed Nite2, and OpenNi2.
Opened unity, asset store, Installed the openNi2 asset.
found and reconfigured the paths for the drivers / redit.
try to run...

System.Exception: Error initing OpenNI: DeviceOpen using default: no devices found

On different project, have not problem running the kinect (k2).
tried google, "official" openNi2, and general searches.
No go :-(

Help.
pls.

:-(


Hope this is the correct place,
if not - Please redirect.