Oculus with 4.10 and Windows 10 VR Preview greyed out

I’m not even sure i’m running the right stuff, the project files they supply are pretty confusing, but for instance I try to run OculusWorldDemo (the one that says it’s an application).

I’ve also run the oculus debug thing just now.

both give me the same error. HDM not connected. It is. My oculus is on, i can see my monitor through it (not stereo of course yet).

My HMDI port works fine for my second monitor when i connect that. Wondering what this means, and whether I’m trying to run the right demo files.