An idiots guide to using the Oculus SDK with FMOD

I work on a project for the Oculus Rift CV1. The problem i have is that the sound created with FMOD plays not on trough the Oculus Headphones but trough my standard speakers! I need 3d sound and therefore i would like to get some support how to get the sound played trough the Rift itself? Even when in the preferences i change the output to Rift Headset it wont use the headset!