It looks like you don't have the module loaded for the NIC, or the NIC is not detected at all. Kudzu is normally pretty good at detecting hardware and configuring it, so it's very possible that the NIC is not supported by your kernel. The command 'lspci' will tell you what hardware you have installed, if you see an ethernet controller or an unknown device that can only be the NIC, then the hardware is showing up and only needs a module loded. After you find that out you can search the web to find out which module you need loaded, then load it with 'modprobe modulename'. If you get an error along the lines of "Module not found", then you will need to upgrade to a newer kernel. If 'lspci' does not report an ethernet device then you could have a faulty NIC or PCI slot, or the NIC may not be seated fully in the slot.