Macbook Pro to WD TV streaming

Does anyone have step by step instructions on how to get the WD TV Live to find a computer?  I have a Macbook Pro running OS X 10.7 Lion and can’t seem to get the WD TV to find anything I’m sharing and stream it through the media player from my laptop. I have movies in iTunes I’d like to stream as well

Is this even possible?  The WD website says so, but I’m starting to wonder.

Thank you for any and all help.

Make sure the you have configured the network settings properly. 

Take a look at this link :

How To Configure Net Settings

You can also check this  one