Microphone not working when using app

Hi, when i use my micophone, either the one in the headset or the intergrated mic (which works fine in calls) on the iphone. I press the push to talk button on the app, and the little blue circle next to my name begins to light, but when i talk no one can hear me (tryed to log on ts on my pc to verify). Then i tryed to reinstall the app, which removed the "client flooded" issue, but the mic is still not "recording" my voice, and no one can hear me.
I use Iphone 5 with the newest update, and the pc i've tested on has windows 10, but this pc got no problems, and works fine. It's

Microphone not working when using app