You can't get advice on a forum. You need to get some coaching off someone who knows what they are on about otherwise you'll find yourself picking up bad habits.
Without someone seeing where you are going wrong it is impossible to pinpoint what is causing your problem.
Next time your at your club ask a AA grade shooter to show you how it's done.
To try start telling you on here would go on forever and you'd still not get it right.
They are so many things to get right that are in itself only little changes, but get only one of them wrong or don't do it and you'll miss.
Unless of course you wear a shooting jacket then it's impossible to ever miss.