Oculus dk2 do not show stereoscopic view

Hi ! I am rookie with Oculus Rift dk2 and Unity. I have tried to do some exercises first with Unity 4.5.5 free and now with Pro version and Oculus. Just doing this Tuscany demo (OculusUnityIntegrationTuscanyDemo.unitypackage) Everything works fine, but when I build and run my scene I see in the Oculus two separate views. No stereocopic view. Unity logo looks fine on the start.