its only a light fitting,if you cant work it out,get a electrician to fix it,
mm
December 2010
one cable will be live the other won't the one that aint is the switch wire.set your meter to ac volts, one probe on the cable the other (black) on the earth or the metal box which should be earth,this will show if you have the live wire.
jed
November 2010
look at this
http://www.ultimatehandyman.co.uk/three_way_lighting.htm
Sparky
November 2010
look at this
http://www.ultimatehandyman.co.uk/three_way_lighting.htm