Question headset microphone not working

[Rikizu]

Hello,

My headset microphone is not working despite it being connected. Both playback and recording settings are both default to the headset and output and input are correct. I can hear audio but can't use microphone. I have download all the latest drivers on my motherboard. Any possible issue that can cause this?

 

[Phillip Corcoran]

How many 3.5mm jack-plugs does the headset have, one or two?

 

[Rikizu]

2 with a splitter, I connected each to its corresponding plug-in