The very first time you connect your HuddleCamHD camera to your computer you may need to do so without a extension cable. It's always best practice to connect the camera directly to load any drivers automatically and avoid a issue with the drivers for the USB extension cable. Then you can install your camera and connect to the computer using your extension cable and everything should work fine
Also, be sure your extension cable isn't run backwards. You should be able to use the USB cable that came with your camera to connect you camera to the extension cable, and then the extension cable goes into the computer. If you run this cable backwards it will most likely not work.