Wrong exposure with ASI1600

Hi.
I’m having some problems with SGP and ASI1600MCC Camera.
The camera is connected directly to PC, i’ve tried some usb ports.
Both in “Frame and Focus” and in Sequence acquisition, i’ve some frames completely underexposed.
Here’s an example:

Correct exposure:

Wrong exposure:

Can you help me?
Thanks!

Hi Giancarlo,

This thread from last September might give you some direction.
Good luck,
Mark