Wireless unclaimed on ubuntu

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http://askubuntu.com – I am using Ubuntu 12.04. I could not able to see the wireless connections. shahi-laptop:~> sudo lshw -C network *-network UNCLAIMED description: Network controller product: BCM4313 802.11b/g/n Wireless LAN Controller vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:12:00.0 version: 01 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: latency=0 resources: memory:fbc00000-fbc03fff I used sudo apt-get install wicd-daemon sudo apt-get install linux-firmwa (HowTos)