NIC has to be installed manually
Even i faced the same problem some time back. I tried searching the net but nothing turned out. The thing that worked out for me was the compiled the source code form my NIC driver cd and made some modules. I know it sounds complicated but believe me it's damn simple. Just follow the steps listed in the readme file in the linux folder of the cd. In case you don't have your driver cd with you goto the NIC manufacturer site and download the source code and do the same thing, it must get you NIC up and working fine.