Simple outdoor power point not working correctly?? 
	
	
		Hi there, please help, I have wired many of these in the past but for some reason, its not working out (really confused), I have connected a single outdoor 10A switch with a power cable -3 core, through a 20 mm flexible conduit, of 1.3mt, through a brick wall and connected it to the back of a std inside wall double power point as I have done many times before, checked wiring (colours) all correct on both sides!
There is power in the cable to the switch- flick the switch on, then the power travels to the Outdoor water pump, (only a small pump) goes through the pump, but no action,? 
Plugged another item to the power point ,switch it on No power at all? What? 
Please help, surely not a faulty cable(which is new)! 
I have bought a 3rd new power point just in case but---NO!
Cheers if you have the answer,
Regards Ant