Let me begin by saying I am no expert on clickers. In fact, I have only been shooting one for a couple months. What I have learned is this: Set the click just past where you anchor. As you reach your anchor, you have to continue to pull ( using your back muscles ) through the shot until you hear the click, then release.
Make sure you are not over bowed. If you are, there is not a clicker in the world that will help.
Good luck