front audio panel

Can someone help me about my front audio panel.I've bought my self new headphones and i plugged them in my front panel but only the headphones worked my mic didnt work.I have realtec AC 97 sound card and there is an option to disable back panel when something is plugged in front panel but that dont work.A friend told me that i need to set the audio settings in the BIOS for AC 97 but i cant find nothing in BIOS for audio settings.Can someone help me.

What motherboard do you have?

Also consider the possibility that you didn't plug the pins into your motherboard correctly.