LMS 3.71 Gated Response

Hello everyone. I hope you are all doing fine. I have LEAP and LMS from LinearX co that does not exist anymore due to passing away of its founder.
Now I am noticing that even though all calibration passes with no failure, the gated measurements are not what they used to be - it is very low to almost just room noise. I have tried installing it on a different slot and even with several calibration, resulted no change.

Could you suggest anything?

PS. The regular sweep is working fine and is correct!

Thanks,

Vilic.