Latitude D630 - How to make the Internal Mic; default ?

Hi!

 

I want to make my internal mic; default. How should i go about fixing this ? Currently everytime I need to use voice (eg for a voice chat) it defaults to Microphone and i do not have an external microphone. I have to then manually go into the voice settings in the control pannel and change to the internal mic.

 

I am running Windows XP SP2 

 

Thank you,

Mayav...