Black screen on dk2 when running Unity build

Hi, when I built a project on Unity, it runs well on dk2 but when I start the .exe I can see only a black screen on dk2 but it runs ok on laptop’s monitor.
Runtime 0.8
Unity 5.2.2.p2

It happens the same wild every Unity .exe downloaded from net.
Any suggestion plz?

Hi folk, this is a simple thought but it worked for the same issue, just after building your exe , try wearing your Oculus Head Mounted properly and now you can see your game inside your Oculus and it will work on your monitor too, this black screen after building exe would be happening mostly when you are testing your Build exe without wearing your Oculus , as far as your Oculus is mounted to your eyes properly , there wont be any black sceen!!