virtualbox.org

I have a Macbook pro with Snow Leopard V. 10.6.3
I recently install Virtualbox 3.1.6.
But I'm having some trouble to connect to internet (wifi) from my Airport Extreme.
I install Windows XP 64 bits, but the icon of internet (down the right corner) doesn't appear; I only see the keys (of activate Windows), the icon of sound, the battery life and the Windows notification shield.
What can I do?? or where I can find some tutorials?
I'm trying to look out in Networks but it only say about LAN or telephone, and I only have wireless internet access.
This is my configuration...

Not sure if this is the same problem, but I cannot get a network connection to work at all in Windows 7, XP install works fine. Seems to be a driver problem?

Latest MacBook Pro, Host OSX 10.6, Client Windows 7

After doing the last VB update I didnt check under Advanced for the nertwork card option, after selected one of the Intal card it started working for me.