mic problems?

I just bought myself a pair of cheap headset/mic from CD-R King Gateway yesterday. They cost around PhP100. At the store, the sales girl tested it first to make sure it wasn't a dud. She plugged it into this mini-MP3 player and it was indeed working fine. They told me that they're unable to test the mic since their computer's down. So, I said, "Ok.. This has warranty naman.." 1 week replacement daw. So I got home and plugged everything into my laptop.

To test the mic, here's what you do:

1. Open up Volume Controls. (You can reach this by double-clicking on the little speaker icon on the lower-right corner of your screen. Or you can go to Start>Control Panel>Sounds and Audio Devices>Volume Tab>Click on Advanced button)

2. Make sure that the Mic In section is not set to mute!

3. Then next, open up Sound Recorder (from Start>All Programs>Accessories>Entertainment>Sound Recorder)

4. Click on the Record button and start saying something.. hehehe.. (I played a song using my mobile by placing it near the mouthpiece)

5. Click on Stop and then Play. If you're able to hear what you said/played, the the mic is working! You're good to go!