Plz sm7b and dmp3 users help me !

When I plug my sm7b in the dmp3, i should let the hi gain at 9' o clock,
But I got no Vumetres in the dmp3 (but I got a sound) and I got this Hissss.

I tried with a basic shure mic, I got the vumetre and less Hissss...

Any ideas ?