How do install a water line into a refrigerator ice maker?

I've changed the Ice maker and the wated controler on the back of the Frige.... But when I turn the Ice maker on nothing happens. It's been on several hours now and no water has filled the the resovoir. I am thinking that the device should rotate and will release water into the resovoior. Is this correct or should water flow in once it's hooked-up?