Windows 7: Built-in mic isn't working

I use TeamSpeak 3 and I was trying to talk, but friends could not hear me, everything is fine with TeamSpeak and I have done everything to help, like turning up the microphone volume on my laptop.
It is an MSI Wind U135 DX (I don't know if the DX part counts or not)

Help would be appreciated, however I am trying to download a driver off of the MSI website at this moment. *Edit* The driver did not work And by the way I am using Windows XP, it sucks but you know



Thankyou

Kaveman

Finish downloading the MSI Drivers, normally it's the drivers. If you've got more than 1 Audio output, you need to change the settings on TeamSpeak control panel. I can also help you with that if this doesn't work. Come back if you need more help.

• Start > Control Panel > Hardware and Sound
  
• Control Panel > Speakers Properties > Microphone

I have XP so its not like that, however I went onto Control Panel>Speech and turned everything to the max and non-muted, and thankyou for the help