Oeh, ralink... die is eng en gebruikt geen wpa_supplicant
In /etc/network/interfaces doe je zoits als dit:
iface ra0 inet static
pre-up iwconfig ra0 essid YOUR-SSID
pre-up iwconfig ra0 mode managed
pre-up iwpriv ra0 set Channel=11
pre-up iwpriv ra0 set AuthMode=WPAPSK
pre-up iwpriv ra0 set EncrypType=AES
pre-up iwpriv ra0 set WPAPSK="YOUR-WPA-PSK"
pre-up iwpriv ra0 set TxRate=0
en de rest....