Simon,

I'm not familiar with SwitchLinc switches, but how many wires come out the back and what colors are they? Are they 2-way or 3-way switches?

According to your message, you said you have only a black and a white wire?

For a typical 2-way light switch, there should be a minimum of 2 black wires from the box to the switch. There will be third black wire if the wall switch is in the middle of a circuit and the current is "piggy-backed" onto the next switch/outlet to supply power to it. Neutral (white) should bypass the switch and go straight to the light.

Red wires are typically seen either in 220V wiring or a 3-way switch.

Kinda confusing... :P

Roland