No sound when i start my DAW

Hi,

If i load Moog editor in maschine, i can play with the synth (USB) but if y closed the daw and reopen it, the Moog is well recognized, it receive Midi notes but i have no sound. Sometimes i have to move “the volume knob” or “the velocity volume” inside the editor to get the sound…sometimes, nothing !

What’s the matter ?

Thanks