Reply to s4 and mic input: i need some clarifications

I want to use a mic with my s4 (never tried till now O_o), so i just put my PC mic (wich ofc is not the one i will use in a club enviroment, but it works for a try :P) and turned mic vol up.....
no audio out from it
tried to move the gain and the mic volume... nada....

there is something i'm missing?
i've checked the options in traktor, and seems ok to me

I will buy a decent mic and an adaptator from 6.3mm to stereo RCA to use it as live input and to put effects on it, but i wanted to try out how it works fist, without the risk of spending my money worthlessly ^_^