Further to my earlier reply, sorry not to have mentioned the neutral requirement. I have wired up several in my lounge, but I am in Spain and wiring is different here (very!!). There is a 'neutral' wire behind everything, although positive & neutral are very different things here.
If you could somehow access a neutral wire in your system and draw this through to the space behind the switch, this would work.
I am though an amateur electrician, who has miraculously survived death through the years despite wiring all sorts of lights etc, so I would suggest professional help with my suggestion if you are in any doubt!