I've accidentally killed my wireless connection

[Stretchkev1]

I'm a recently new comer to Mint 12 from ubuntu 11.04 and still new to linux for that matter. With no problems and I love the everything about Mint. But I've run into a bit of snag, I've lost my wireless. Wired connections work just fine.

Important computer stats ASUS U56E laptop with an Intel Centrino Wireless-n 6150 chip which has had problems accessing networks with the kernel 3.0. While attempting to downgrade to an older version of the kernel I've managed to kill the wlan0 by accident and I don't know how to reestablish the driver. I don't know if I've lost the driver or if I've just disabled along the way somewhere. Any help would be appreciated, thanks.

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#iwconfig

lo        no wireless extensions.

eth0      no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:off/any 
          Mode:Managed  Access Point: Not-Associated   Tx-Power=15 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
.

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rfkill list all

0: asus-wlan: Wireless LAN
   Soft blocked: no
   Hard blocked: no
1: asus-wimax: WiMAX
   Soft blocked: no
   Hard blocked: no
2: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no

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lshw -C network

WARNING: you should run this program as super-user.
PCI (sysfs) 
  *-network UNCLAIMED     
       description: Network controller
       product: Centrino Wireless-N + WiMAX 6150
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:02:00.0
       version: 67
       width: 64 bits
       clock: 33MHz
       capabilities: cap_list
       configuration: latency=0
       resources: memory:de800000-de801fff
  *-network
       description: Ethernet interface
       product: AR8151 v2.0 Gigabit Ethernet
       vendor: Atheros Communications
       physical id: 0
       bus info: pci@0000:04:00.0
       logical name: eth0
       version: c0
       serial: c8:60:00:2c:fc:47
       size: 100Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.1.0-NAPI duplex=full firmware=N/A ip=192.168.1.69 latency=0 multicast=yes port=twisted pair speed=100Mbit/s
       resources: irq:53 memory:dd400000-dd43ffff ioport:a000(size=128)
WARNING: output may be incomplete or inaccurate, you should run this program as super-user

[Stretchkev1]

Okay I got it the option to connect wirelessly back and running, but it still won't let me connect to the network. After acouring the net for the last week the only solution so far I've come across for this particualr wireless card (see below) is downgrade the Kernel to 2.6.38, which is what got me into trouble in the 1st place. So now I have two questions: Is this really my only option? If it is does anyone know where i might find instructions doe this? I've only come arcoss some script that does this, but I'm still too new of a user to do that kind of thing with any confidence.

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 ~ $ inxi -SNxc 0
System:    Host stretch Kernel 3.0.0-12-generic x86_64 (64 bit gcc 4.6.1)
           Desktop Gnome  (Gtk 2.24.6) Distro Linux Mint 12 Lisa
Network:   Card-1 Atheros AR8151 v2.0 Gigabit Ethernet driver atl1c v: 1.0.1.0-NAPI port a000 bus-ID: 04:00.0
           Card-2 Intel Centrino Wireless-N + WiMAX 6150 driver iwlagn v: in-tree: bus-ID: 02:00.0


[jimzhong]

Do you have windows on your laptop. If yes, go into windows and then enable wireless connection.