Ethernet on CycloneIV GX dev board

hi

I just got cyclone iv gx transceiver starter kit.

and trying to use Ethernet.

I could compile sample project.

I could make NiosII small projects like "hello from NiosII".

and this kit already contains a system which already has webserver.

now what.

how can I use Ethernet from NiosII software by myself.

I tried uClinux which doesn't work somehow.

I tried simple-socket server which couldn't compile ( because it doesn't have AN91C111).

does somebody know easiest way?