Couldn't connect to wireless networking

[纵横天下]

>
> Too many possibilities to tell.
>
> Is your DNS server configured? It should be in /etc/resolv.conf.
>
> Is your default route set?
> netstat -rnf inet
>
> What is the output of
> ifconfig wlan0
>
> Most of these things should be set by DHCP, but may not be.
> If it shows as associated, try pinging your router.
>
> Still, without more information, it's all just guesses on my part.
>
> --
> R. Kevin Oberman, Network Engineer
> Retired
> kob at gmail.com
>
>

OK.
the output ifconfig wlan0:
wlan0: flags=8c43<UP,BROADCAST,RUNNING,OACTIVE,SIMPLEX,MULTICAST> metric 0
mut 1500
ether 00:26:37:64:1e:b9
inet 0.0.0 netmask 0xff000000 broadcast 255.255.255.255
media:IEEE 802.11 wireless ethernet autoselect (autoselect)
status: no carried.
ssid "" channel 6 (2437 MHz 11g)
regdomail 97 indoor ecm authmode WPA1+WPA2/802.11i privacy ON
deftxkey UNDEF txpower 20 bmiss 7 scanvalid 450 bgscan bgscanintvl 300
bgscanidle 250 roam:rssi 7 roam:rate 5 protmode CTS wme burst
roaming MANUAL

ifconfig wlan0 list scan
<empty !! just now it could find ssid WEB...>

netstat -rnf inet
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
0.0.0.0/8     link#4     U       0     0      wlan0
127.0.0.1    link#3     UH     0     0      lo0