I have a new ceiling rose with two ports - blue and brown. The wires from my ceiling are black, red (several reds twisted together), green, and a black with a brown sleeve. We cannot seem to get the light fitted. The bulb will light up but the wall switch won't turn it off - it stays on permanently. The switch at the wall also now feels like it won't press down all the way. My two questions are: - Which wires should be connected from the ceiling to the light? - Does this sound like a switch issue - would the switch also need replacing? Any advice would be greatly appreciated.