VR preview glitches

Hi I working on a project, I made my own HUD but when I start the VR preview I got this :

http://image.noelshack.com/fichiers/2016/15/1460812400-vrpreview.png

instead of this :

https://docs.unrealengine.com/latest/images/Platforms/SteamVR/QuickStart/2/Check_VR_Working_00.jpg

My positionnal tracking works well but my HUD is missing and I get a white text I can’t read.

Can someone know how to fix it ?

ps: I’m using a HTC Vive

Here is the answer to this question:
Glitches come from my HUD, just had to disable it to solve the problem :wink: