IntelPerc Confidence Threshold (highgui)

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Hello, I am aquiring depth data using a Creative interactive Gesture Camera which uses Intel's Perceptual Computing SDK 2013. I am trying to to disable depth smoothing by setting CV_CAP_PROP_INTELPERC_DEPTH_CONFIDENCE_THRESHOLD. I am able to to do this using the following line of code:

capture.set(CV_CAP_INTELPERC_DEPTH_GENERATOR | CV_CAP_PROP_INTELPERC_DEPTH_CONFIDENCE_THRESHOLD, 100);

However, regardless of the value I choose for the confidence threshold, the depth image I am getting is always the same. Any help would be greatly appreciated.