Wireless connection setting in ubuntu-12.04.3-desktop-i386 (Offline )

I just installed ubuntu-12.04.3-desktop-i386, but it didn't detect my wireless card (BCM4313). I don't have internet connection in ubuntu, but i have wireless connection in Window 7 environment.

I googled about it, and I found this solution for offline operation:

1. I believe the package you need is linux-firmware-nonfree.




2. Please download the package, transfer it on a USB stick or similar to the desktop of the Xubuntu machine.




3. Open terminal and type:

   
   
   

   sudo dpkg -i Desktop/linux*.deb  
   
   sudo modprobe -r b43 && sudo modprobe b43
   




4. You should be all set.

   
   
   
   
   
   • I have followed the above instructions but still it is not working.