VR only works in VR preview not in another mode (Standalone or other options) Why?

I’m using Oculus Rift. The problem is that the VR pawn works only in VR preview mode not in any-other modes like standalone, in editor. The camera either falls down. But this works perfectly if I play through PLAY->VR Preview.

I Tried enabling the HMD through ENABLE HMD node
I tried the console command to enable hmd/stereo
Nothing fixed this!

This is perfectly normal. The only modes that support VR in the editor are VR Preview and the VR Editor itself. If you need to test your VR experience as a standalone application you need to package it (make sure the Start in VR option is checked).