James
From your picture it looks as if you have got the wrong type of switch as Michael and Russel have said.
You have two options, 1. buy a no volt release switch. This will have a momentory push buttons for on and off. When you press the on button a relay will latch on and maintain power to the motor until you press the off button.
The second option is to use a simple on off switch.
Option 1 is safer because if the power is disconnected, the motor will not start without pressing the on button again. With option 2, if the power is removed and the switch is left in the on position the motor will start when power is restored.
If going for option 2 it is advisable to use a double pole switch that switches both line and neutral. In both cases the switch needs to be able to handle the starting current of the motor.
Hope that helps
Edited By John Shepherd on 03/07/2012 11:19:29