RB433 as station cant connect with WPA2

Hello,

I was trying to setup my MK AP RB433AH as a wireless client (WLAN - Station). I could not get WPA2-PSK (AES or TKIP) to work.
RB433 keeps getting this message in log:
4-way handshake timeout (15)

The router I was trying to associate with was Asus WL-500W.
If I use WPA-PSK with TKIP encription everthing works like a charm..

Anyone else managed to associate MK RB433 with WPA2/AES to some other router?
Thanx
Huntah