I cant make my wifi button switch on in ubuntu 12.10

hi
wifi on my hp-dv6 has suddenly stop working. it didn't get connected and when i checked my network setting i found that when i try to make the wireless button on it remain off. and nothing happens

please help em solve this problem

Output from: sudo lspci --
...
0a:00.0 Network controller: Intel Corporation Centrino Wireless-N 2230 (rev c4)
...

Output from: sudo lshw -class network --

*-network DISABLED
       description: Wireless interface
       product: Centrino Wireless-N 2230
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:0a:00.0
       logical name: wlan0
       version: c4
       serial: 68:5d:43:c1:6f:dd
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=3.5.0-21-generic firmware=18.168.6.1 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
       resources: irq:46 memory:d4500000-d4501fff

Output from: sudo rfkill list all --

0: hp-wifi: Wireless LAN
 Soft blocked: no
 Hard blocked: yes
1: hp-bluetooth: Bluetooth
 Soft blocked: no
 Hard blocked: yes
2: hp-bluetooth: Bluetooth
 Soft blocked: no
 Hard blocked: yes
3: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
4: hci0: Bluetooth
 Soft blocked: no
 Hard blocked: no

i also tried sudo rfkill unblock all
it dont work