[Rwp] problems with reaper peak watcher, or my soundcard?

[germano carella]

Hi to all,

I was trying to use reaper peak watcher to control level of microphone.

Now I pres alt+shift+p to set up my peak watcher to notify me when level 
is at 0 db.

So, with my focusrite 18i8, i set gain to maximum level possible.

With alt+f9 and alt+f10, I hear -38.7 db.

But volume is maximum!

By pressing j and k, I hear -55.3. So I believe there is a problem, 
maybe with my soundcard? Unfortunately scarlet mix control is not 
accessible, so I can't see input levels etc.

Some suggestions?

Thanks!

Germano