grid k2 and uuid

Hi

I have installed the grid k2 + drivers on centsos 7
when I run "nvidia-smi -L" I get:

GPU 0: GRID K2 (UUID: Unknown Error)
GPU 1: GRID K2 (UUID: Unknown Error)

the cards are installed on a Supermicro server (no vmware)
Driver version 361.28

if anyone has any idea…