Ethernet interface using DE0 board

hello every one

Im using FPGA for the first time

using DE0 board cyclone 3 , I need to implement ethernet and many other things

i tried to search but found almost nothing

using SOPC builder 9.1

Interface Protocols -> Ethernet -> LAN91C111 interface

i got this error : it must be connected to an Avalon MM tristate master

which is not found in my component list

i got instead Altera Avalon MM tristate master BFM

when i try to use , it makes more errors but not resolving the main error above

im sure im making mistakes

but i know no one who can help

hope that you could

waiting for your replies

thanks in advance