midi keyboard dosen't work

Well…
I have a midi keyboard - umx 610

I use it with kontakt - works great.
with ezkeys - perfect.

I open my cubase, I choose the instrument i want to work with, and in the browse menu i can play and everything works fine.

I try to record - nothing. In fact - the vst (no matter which one) does not respond when I play. But with my mouse I can play, very easily.

I searched for help - tried everything - and nothing happening… :neutral_face:

I have Cubase 8, LE-AI Elements.
PLEASE HELP ME.

Yours,
Roei.