Wi-Fi setup with WPS from router

it seems wifi with WPS is working fine by me but it's not implement in Enigma2. Are their known issues or with newer openembedded it just start to work?

I do as follow this actually easy steps:

step1: Adjust /etc/wpa_supplicant.wlan0.conf

ctrl_interface=/var/run/wpa_supplicant
update_config=1

step2 by telnet/putty command:

wpa_cli wps_pbc

step3:

press router WPS button within 2 minutes

step4 your wifi settings (SSID and password) should been found. Just for check if it's ok: /etc/wpa_supplicant.wlan0.conf

ctrl_interface=/var/run/wpa_supplicant
update_config=1

network={
        ssid="XXXXXXXXXXX"
        psk="XXXXXXXXX"
        proto=RSN
        key_mgmt=WPA-PSK
        pairwise=CCMP GCMP
        group=CCMP GCMP TKIP
        auth_alg=OPEN
        pbss=2
}