For some reason, it started working on its own now. Thanks, though.

Hm. Perhaps it's just not got the proper driver. I remember when I first had mine I didn't have the right driver... download the Realtek AC97 sound driver here and try it.

http://www.realtek.com.tw/Down [...] n=3&DownTypeID=3&GetDown=false

Then follow the configuration instructions here and that might help.

http://www.troublefixers.com/m [...] or-mic-not-working-in-windows/

Let me know if this still does not work.

Same thing with other microphones.

Have you tested other mics or is this the only one you've got?

It's not a USB, just a regular plug-it-in-the-right-phone-jack. I did. Doesn't work. Like I said, I'm thinking it's the card.

Even if this isn't really a Balto or site related question, I'll do my best to answer this.
Be sure, if it's one with two things to plug in (jacks), that the headphone jack is plugged into the green slot, and that the microphone jack is plugged into the pink slot. Sometimes the jacks are color-coded so you know where to plug them in. If this does not work, try plugging them in into the slots at the back of your computer instead of using a front slot. Often this works for me.
If it's a USB headphone set, try plugging it in at the back.

If this still does not work, you may need to update your drivers.