Im guessing its all the way down position.If it is all the way up,make sure lock is not on....dont laugh.
Do as post #2 said.Lock in up position,retighten manual valve,slowly undo fill screw,fill till full,close then tilt up and down 4/5 times to bleed system,then repeat filling till it wont take anymore fluid.Check for correct fluid...usually ATF,though sometimes oil.