Ubuntu: wireless enable isn't worked.

I used my notebook HP dm3-1032TX to install Ubuntu 10.10.Below these steps I can surf the Internet by wifi.

light@light-HP:~$ cd /sys/devices
light@light-HP:/sys/devices$ iwconfig 
lo        no wireless extensions.

eth0      no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:off/any
          Mode:Managed  Access Point: Not-Associated   Tx-Power=off
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
        
ppp0      no wireless extensions.
light@light-HP:/sys/devices$ rfkill list 
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: yes
Hard blocked: yes
2: hp-wifi: Wireless LAN
Soft blocked: yes
Hard blocked: no
3: hp-bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
light@light-HP:/sys/devices$ rfkill unblock 1
light@light-HP:/sys/devices$ rfkill list 
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes
2: hp-wifi: Wireless LAN
Soft blocked: yes
Hard blocked: no
3: hp-bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
light@light-HP:/sys/devices$ rfkill unblock 2
light@light-HP:/sys/devices$ rfkill list 
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: hp-wifi: Wireless LAN
Soft blocked: no
Hard blocked: no
3: hp-bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
light@light-HP:/sys/devices$

refer from:
http://www.beautyorange.com/2011/01/how-to-enable-wireless-in-ubuntu-manually/