Virtualbox Bridged network mode

Hi guys,
I am trying to run Windows XP inside a Virtual Machine.

I got to install it and everything looks super cool but I can't get to have the network working.

This is the network settings page on the VM : http://i.imgur.com/zaSn3rC.png

When on Windows XP, I can see the network, DHCP even gives me a valid address and recognize the gateway.
Everything looks good but I can't ping anything.

Am I missing something?

thank you!