recording voices probleme on my z2 topic

hi
i'm new in SONY mobiles . but i think what i have got isn't a big problem .
when i try to send a voice on facebook messenger or even when i download a recording apps ( voice recording ) i kepp talkin n talkin but no thing shows on
but when i do call some when he can listen to me normaly . so it's not a micophone probleme
wht to do ?!