your arrow is falling off because your nocks on the string are too close together.loosen them up and put a square on the rest and set your nock ponit where it is now if it shoots good there or set the bottom nock square with the rest.then crimp only the bottom one and leave the top loose.then put a arrow on and pull it to full draw.this will push the top nock where it needs to be.then let the bow down.take the arrow off the string and crimp the top nock.this will keep the top nock from pinching your arrow off.make sure your arrow nocks fit good and are not real loose either.hope this helps.this does work I've been there.