No sound

It Might help to se a graphic of the main page. Can you see the waveform when recorded in the Audio track.

Maybe check the output on the recording channel strip. Open the Mixer and make sure the output is set correctly in the Master strip as well.

Ok, you're going to have to give us a clear description.

By Mobile Pre you mean M-Audio Mobile Pre.

We Need what Mac Operating System and your version of Logic. You Tagline says 10.11 El Capitan, is that correct?

How are you recording the Drums, you have Microphones into the Mobile Pre?

What Kind of Microphones.?

All this information matters as your problem can be any number of things. Accurate information.

Not enough information.

Audio or MIDI. Are you using an audio/MIDI interface, what do you have selected s the Output Device in Logic's Preferences/Audio?