Microphone not detected nor PTT even showing?

[Purdy]

So yesterday all of a sudden my push to talk simply won't work, can't even get the little icon above my head or portrait when i push to talk, and when i do the mic test nothing works.

Mic is a Razer Megaldon.

And yes i'm definitely pressing the correct PTT button.

[Tobias]

Is the correct device selected in the settings?