Sounds like CG is to far forward. It is also often necessary to add a slight bit of power which helps to keep the tail down. When the airplane is in the elevator, both wings are stalled. The airplane can then drop the nose and if it is allowed to do that, it will gain forward velocity and the wings will start to fly again, this often manifests itself in wing rock and can be alleviated with a little power to bring the nose up, slow the decent and bring the wings back into a stalled condition.