No UNITY shadows on publish

[phatpixels]

Hello, i have been using unity for some time, but only just started using the vive VR for training purposes. I find when i publish a unity exe, my light shadows disapear totally . Even on the most basic scene and provided steam examples. Iam using the steam camera in unity. 

 

I must be missing something obvious. i have tried changing every setting. It all works perfect in preview mode, but when published to exe, shadows are missing.

 

PLEASE HELP>