[wubi] Wireless not working (BCM4312)

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http://ubuntuforums.org – I just installed Kramic Koala, but the wireless does not work. It did work in Ubuntu 9.04. I think it is because of the Kernel that it doesn't work. I tired to install, and reinstall, the package bcmwl-kernel-source but no luck. I tired to go to the Hardware Drivers, but it said "not in use." I tried to click "activate" but nothing happened. Is there any suggestions how to resolve this issue. I would really love a method that does not require internet access via a wired connections. I think that the only way to fix the problem is downgrading the kernel. Thanks for all your help. (Hardware)