A20-SOM Ethernet emac

[Panametc]

Hello.
I make my board for olimex A20-SOM.
I have a problem whith emac port and drivers. In my board i use KSZ8041 (is a single supply 10Base-T/100Base-TX Physical Layer Transceiver, which provides MII/RMII/SMII interfaces)
I choose this chip becouse i can buy it in my country and it works whith fiber transiver.
By default in A20-SOM set gmac port in script.bin and use RTL chip on A20-SOM-EVB.
I change gmac on [emac_param] how written in manual http://linux-sunxi.org/Fex_Guide#.5Bemac_para.5D All pins in A20 and KSZ8041 chip same as in manual. I was use fex2bin tools for windows and make script.bin file whith emac and start the board, it starts OK but command ifconfig no see eth0. only usb and loopback

What i must do to make it work ?

P.S. Sorry for my bad english.