Keyboard backlight doesn't work in Windows

I used Boot Camp to install Windows 7. The install went fine, and the drivers seemed to install without any problems. I noticed, however, that my backlight does not function. All of the function media keys work (brightness and such), and when I press the backlight buttons, I can see the pop up acknowledging the change in back light, but the light never actually turns on. Is there a way to fix this without me reformatting the partition I just installed and updated?

When you say "null on the light bar" do you mean that there is an on-screen indicator that appears when you press the brightness keys, but it doesn't change?
Which Mac are you using? I have a 13" MacBook Pro (2010) and those keys seem to work fine for me. But I just installed Boot Camp, so I might be using newer drivers than you are.
Are you using Boot Camp 4? This just came out with Lion. It allows for automatic updates to the Windows drivers and support software. If you installed Boot Camp before you upgraded to Lion, then you might need to upgrade your Windows drivers to Boot Camp 4. See here: http://docs.info.apple.com/article.html?path=Mac/10.7/en/mchlp15553.html
If none of this applies to you, then I'm not sure what to do about it, other than talk to an Apple service rep.

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