Recieving noisy signal from Blackmagic Camera

Hello,
I have a Blackmagic equipment:

Ultimatte 12 HD Mini
Blackmagic Pocket Cinema Camera 6k Pro
Blackmagic Pocket Cinema Camera 4k

No matter what camera I connect to my Ultimatte HD Mini I receive the wite noise on the screen. The noise changes by changing the light. I do not believe it is up to the keyer I belive it os just the signal I am receiveing from my camera, but I am not sure anymore what needs to be changed and what needs to be set up. I say that this is the problem because I receive the noise even on the Foreground Input View.
In attachemnt are pictures of noise. I hope that someone could help with this.
Thank you in advance

[Ron Ungerman]

Make sure the Backing color is set to green. You also might not have enough light on the green screen to set a matte. Try using the Screen Sample control. Or add some more light to the green screen