So I have a little problem.

My setup:
Internetprovider modem (wpa2-psk) ------- wireless -------- Asus WL500W - computers

I'm using WL500W- on my asus router. I want to use the router in client mode and connect wireless to my modem. And computers are connecting by wire to the asus router. So I have set up SSID exactly as my modem. Under advanced i changed Extended Mode to Station.

I got everything working when using WEP. But I want to use WPA2, cause I want to use N standard. I have tried all wpa settings under wireless - interface but nothinh workes. The Air led on the router just flashing.

Should Client mode even work with wpa2?

I'm not very good on linux commands so please explain step by step.