I see video coming from the camera, but nothing else, and the green light keeps flashing. Also the Kinect in sleep mode, meaning it's tilt down instead of raised up.
Does anyone know what's wrong?
If you see video, then the Kinect is working. Try using the samples that ship with the Kinect Developer toolkit, like Kinect Explorer. The download is available here http://www.microsoft.com/en-us/kinectforwindows/develop/developer-downloads.aspx
The "tilt down" is something you, as a developer can control. Using the Kinect Explorer sample, set the Tilt to 0 and, assuming the Kinect is on a flat table, that should give you the correct angle.