Headset issues/help

hey all, i wasn’t sure where else to go with this so thought i would try here. i’ve tried google which didn’t help. anyways, i just bought my first headset (wired stereo headset). i can hear through the headphones but it always says my mic is off and i don’t think anyone can hear me. when i look at the menu/player list it always looks like i’m muted (audio symbol with a line through it) i’ve toggled the switch on the headset between mute/unmute and the menu always shows me as muted. anyone have any ideas or assistance? thanks in advance.