Gear VR app got stuck with pink screen

I am developing an app for GEAR VR, I need to play open door animation using raycast. The project is working fine inside UNITY.I followed all the steps for creating Gear vr apps, like importing Oculus Utilities, replacing the project setting folder, changing player settings, adding signature file. But after deploying the app and viewed through note 4 and Gear vr, after the unity logo screen, I can only see a pink screen. Can someone please suggest the possible cause of this problem. Its urgent.