You have to install drivers manually, you have to download the EFW Community 2.4 devel SRMPS to install the packages you need to install your nic drivers.
I have to do the same for my Atheros AR8131 onboard nic.
http://efwsupport.com/index.php?topic=610.msg1697See that topic but remember that you need the 2.4 version of devel SRMPS.