headset

okay i bought a new headset yesterday and plugged it into the mic and headphone inputs in the front and the sound and mic works(i can hear myself though the speakers) but other people cant hear me on TeamSpeak. please i need help, thanks 

Flight Simulator and other chat
https://forums.simviation.com/phpBB3/
https://forums.simviation.com/phpBB3/viewtopic.php?f=9&t=26932