problem with wpa_supplicant

Hi. I've been recently upgraded to -CURRENT (9.0).
After
# make buildworld
# make buildkernel KERNCONF=MYKERNEL
# make install kernel KERNCONF=MYKERNEL

I have rebooted to single-user mode, as suggested in the documentation.
No more wireless connection. I've a intel 2200 bg wireless card,
running using the kernel built-in iwi module.

In particular, when I run wpa_supplicant -i wlan0 -c
/etc/wpa_supplicant.conf I get this:

CTRL-EVENT-SCAN-RESULTS
CTRL-EVENT-SCAN-RESULTS
CTRL-EVENT-SCAN-RESULTS
...

My wpa_supplicant.conf is:

ap_scan=1
fast_reauth=1

network={
        ssid="MY_SSID"
        psk="MY_KEY"
        }

Also, my /boot/loader.conf contains

legal.intel_iwi.license_ack=1
if_iwi_load="YES"

and my rc.conf

wlans_iwi0="wlan0"
ifconfig_wlan0="WPA inet 192.168.1.110 netmask 0xffffff00"
defaultrouter="192.168.1.1"

Again, it worked w/ freebsd 8.1 (stable). Also, I've read in the
UPDATING file in /usr/src this:

Applications such as wpa_supplicant(8) may require a full world
build without using NO_CLEAN in order to get synchronized with the
new structure.

But, I've done a make buildworld before, isn't enough?

Thanks a lot

Davide