problems with BCM4401-B0 Ubuntu 12.04

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http://askubuntu.com – I have been trying to get the wireless on my Dell latitude D520 laptop working for a while now, and all the guides are here are of no help, the solutions i have tried are as follows: -Adding the proprietary driver to the list of active drivers -Installing BCMWL-kernel source adding the list to the drivers usually does nothing at all or wont install, and adding the BCMWL-kernal source knocks out my internet completely, I have to remove it through synaptic to get my internet to run again, but as of about 20 minutes ago my network button on the dash bar now says "wireless networks Device not r (HowTos)