Issue "/sbin/lspci" and post the results. I have this:
00:0a.0 Ethernet controller: Marvell Technology Group Ltd. 88E8001 Gigabit Ethernet Controller (rev 13
on an Asus K8V-X which uses the "sk98lin" module.
Now, I didn't look your motherboard up from Asus site,
nor did I look in the Linux HCL here at LQ, nor did I
search Google <Linux> for it. But if I were you, I'd
open a terminal and as root issue "modprobe sk98lin"
and then issue "lsmod" and see if that feller is there.
You can use the app "netconfig" as root to setup your
network once you get the module loaded.
You didn't include your kernel version, so I can't tell
if that module is actually in your kernel. You can issue
"uname -r" to get that kernel version. The module will be
located at "/lib/modules/`uname -r`/kernel/drivers/net/sk98lin/"
if you've got it.
It's in the > 2.4.32 kernels, not in 2.4.31 iirc.