night 3d vision warning / dayZ loading screen

[Tozzifan]

Hello,
I've just reinstalled via Steam A2/OA, with DZ as the only addon, flawlessly

first a warning for 3d vision users: deactivate 3d vision, otherwise night vision won't be working
....................
my issue:
only twice I've managed to enter into the game, thence it's always a dark loading screen, sometimes the games is not stuck and I can disconnect and return to multiplayer main interface, sometimes I have to kill OA, and start over OA

thanks for any hint and sorry if I've missed the reply anywhere