USBCamera setExposure() not working

[Oromus]

Heya. I've been trying to use the USBCamera class' setExposureManual() function (apologies for the slight title type) to lower the exposure of our Microsoft Cinema webcam. The problem I'm having is pretty straightforward; no matter what values I pass it, the exposure doesn't change. The default exposure is way too bright, and it whitewashes almost every light source/bright surface to the point where the it is entirely white. Has anyone else experienced this, and what have you done to fix it? If you've gotten exposure control working with the Microsoft Lifecam 3000, please share that and what workarounds/fixes you had to apply (if any). We were using the Lifecam last season but encountered the same problem.