I have an outside secrity light which up until a few weeks ago was working ok and suddenly stopped working, couldn't think why it runs from a fcu in my kithcen light, I took the light back and got a new one but still nothing? I had some more sockets fitted in the kitchen recently which all work fine and the light on the FCU (which was also replaced) for this light outside light is on and power is by means of the electrical tester gettting through to where the light is attached, however when ever we try to put the light back on to its base, nothing happens and the light on the FCU goes out? So frustrating remove the light and the neon on the FCU comes back on, any ideas or do I have to recall the electrician and end up spending another fortune? Please Help!