Oculus Rift DK2 and UE4 4.3: problems with Oculus Runtime 0.4

Hello ,
I can’t get the positional tracking to work.
I have the equivalent of a DK1…

Couch Knight is the same. (so it’s not my project etc…)

Using extended, 75Hz, potrait mode…
Oculus SDK 0.4 not installed
Camera driver installed
DK2 firmware has been updated on another PC

Am I missing something ?