microkorg and logic pro midi sound

[mauz]

Hi all
I am quite new on this forum and my first language is not English so i do apologise now with all of you for my typing errors.
I am also quite new user of micro korg and logic pro but I am getting very passionate about it.
I am having some problem of sound.
Whenever I play Micro Korg in Logic pro, connected to a "Novation neo" audio/midi interface, the only way to here my micro korg is only using the audio interface.
I also have a "Motu" 128 midi interface which I tried to connect to My Micro korg.
Here when I am in logic pro, I can play and I see writing down the music in "midi blocs" which I can also rework and modify, but the big problem is that I am not able to here the sound, no sounds come out while I am playing and not sound come out after I created a loop and try it to play it back on logic!! Is like playing and try to record being death.
So it seem my connection with motu , micro korg and logic is fine because something happened......but I am desperate for a sound coming out.Is someone out there with a suggestion? Remember I am a beginner and sometime the obvious for me is not, so maybe there are some setting I don't know..
I will be grateful if someone can help thank you
Mauz