How make Voice Chat SilverLight ?

Hello,

I want make Chat like this it's wonderful i want complete the work as soon.
http://socketlab.com/WCBin/#/Home

The problem i am not start until now from three days i try start but i can't , It's seems very difficult , I don't know what can i use of tools and how start and how and how.
My experience with silverlight it's simple.

Please Help me with clear steps without any Complexity.

Thanks in advance
Waleed,

Here's their codeplex page. Looks like there's 3 silverlight modules here voice, video and presenter. I haven't delved into the code but it looks like a good start.

Link to a Tim Heuer video on how to access the microphone/camera from Silverlight.

Thanks, I reviewing it.