[ubuntu] wirelss problems - please help

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http://ubuntuforums.org – Hi, I am new to linux and ubuntu. I just installed 12.04.1 on my old Dell XPS 600. Everything worked great except I am unable to connect to my wifi. When I go to Network settings it says "Wireless Firmware Missing". I've tried Additional Drivers, but the only drivers that come up are for my video card. sudo lshw -class network gave me the following info... *-network description: Network controller product: BCM4306 802.11b/g Wireless LAN Controller vendor: Broadcom Corporation physical id: 5 bus info: pci@0000:03:05.0 ve (Hardware)