strange cubase behaviour when opening

Hi everybody,
today I restarted Cubase 7.5 after a long period I wasn’t using it and I noted a strange, and potentially very dangerous (for my monitors) behaviour: every time I open the software the audio volume in audio-midi configuration raises to maximum level and I can’t figure out why…
The first time I noted this I had my monitor (adam a5x) switched on and they received a very violent signal input; even if I set the audio to zero before opening cubase it raises to maximum as I launch cubase…
If I launch ableton live it doesn’t happen…
Can anyone help me?
Thank you,
arfo