me too, but after open 3 shell and use
/etc/init.d/networking start
dhclient wlan0
wpa_supplicant -Dwext -iwlan0 -c/etc/wpa_supplicant.conf
(a lot of time, so i don't know the exact sequence)
where my wpa_supplicant.conf is :
network={
ssid=" "
#psk=" "
psk=
}
for psk i used wpa_passphrase
now NetworkManager is not running but Mozilla surf the net :-D

