Make sure your manual release screw is all the way in. If so tilt all the way up and deploy the trailer bracket, check fluid level. If it is fine trim the motor off the bracket and then down to the floor onto a block of wood. Loosen the release screw a few turns and then trim the motor up/down for 5 full cycles of 20 seconds up/down. Tighten release screw. trim up/down to verify operation. If you are still under warranty and the procedure didn't work have dealer fix it under warranty.