Okay, mine is now working correctly. I connected the + - as in the diagram above and powered the camera from Vout VCC and connected the GND from the camera to the GND next to Vout VCC. So, try that and it looks like it should work, if not then looks like a fault on the SPX or camera. make sure to check both PAL and NTSC on your goggles and the camera osd.
Hope that works for you man. let me know.