Pullrite Superslide 5th Wheel Hitch

we have the 16K superglide and we had problems earlier on when we first got it, but now have kinda worked it out to where, we are near dead center on pin and hitch, inch the hitch up a bit till see a tiny gap and try release lever, if still stuck, have truck reverse a tiny bit or go forward tiny bit depending on how you were when you stopped the truck. if your yanking on the lever and its not going, either too much wtg pressing down or its too high up.