Replying to rail - higher than lip on

Whuts up, I got a question for ya'll, I'm havin difficulty on the down flat down rails, the one I been tryin to practice on is higher then the lips so I've been trying to come in on it and angle but I keep riding off the flat part cuz my moment is carrying me, I was wonderin should I be lining the rail up in between my legs and hop on to it? or is do I just gotta figure out how to stop my moment from carryin myself off thx for ne help this rail is pissin me off