Hi, I'm new to this site and am in need of some help!! I installed 2 new celing lights in the upstairs of my house today and when i turned the first one on it worked fine. The second one didn't work at all and when i flicked the switch it knocked all the other upstairs lights off. The wall switch then wouldn't flick on and off properly and seemed damaged. The MCB in the circuit breaker hadn't tripped also. I think i mixed up the live switch wire and one of the 3 neutral wires from the ceiling rose on the 2nd light connecting a neutral to the switch and the live switch wire to the other neutrals. I have the light disconnected now, but when i've replaced the MCB the other lights upstairs are still not working!! Do all lights in a loop system need to be connected for the upstairs lights to work??? Also, will i need a new wall switch etc for the 2nd light? Please help.