I agree with Berny, your bolt rope needs "relaxing". The key was in your comment about the wrinkles. Cut those stitches at the bottom of the rope (and hope no dope of a sail maker stitched it way up) and slide in a new piece. You want to downhaul the sail material, not the rope. Does anyone know why they stitch the bottom at all? You will immediately perceive a HUGE change for the better in sail response to downhaul. I've had to do mine several times.