Steam VR Plugin : Reset Position and orientation

Hello,

I'm currently working with Steam VR Plugin for Unity and i'm converting my whole project for the fantastic HTC Vive Pre and forward.

UNFORTUNATELY i didn't figured out the equivalent to :
" UnityEngine.VR.InputTracking.Recenter(); "

I tried SteamVR.instance.hmd.ResetSeatedZeroPose(); without any success...
Seems on the web i'm not alone but didn't found any answer.

Does anyone can help ?