It is answered only a hundred times in the forum. If you had searched, you would have found
Anyway, your card is based on the Marvell Yukon2 chipset.
There are two solutions.
1) Grab the netdev git patch which contains a driver for Marvell Yukon2 which is not
in the mainland kernel yet. (The skge driver supports only Yukon chips and the mainland
kernel sk98lin driver doesn't support all the Yukons)
You can also get this driver by installing a patchset which contains the netdev like
the -mm patchset (http://www.kernel.org
2) Use the official sk98lin driver from the Syskonnect site (www.syskonnect.de
is the same as the one in the kernel but it is a newer version which supports your card.
Both these different drivers work very well. Install the one you like.