Ubuntu 12.04 Broadcom wireless not working after b43

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http://askubuntu.com – I have a Dell laptop. I was running Ubuntu 11.10 32 bit. During that time wireless was working fine. Yesterday I updated my os to 12.04.now wireless is not working. I have tried installing b43 installer and b43 cutter from software center and activate Broadcom driver. It did not work. Whenever I try to activate the driver, I get error saying installation failed look at /var/log/jockey.log I have opened jockey log and here is the log: 2012-05-10 15:20:00,182 DEBUG: BroadcomWLHandler enabled(): kmod disabled, bcm43xx: blacklisted, b43: blacklisted, b43legacy: blacklisted 2012-05-10 15:20:00 (HowTos)