Training

Are there any Obedience Dog Trainers out there with tips on how to fix a sits and downs stay issue? My dog has now come up with an out of sights sits and downs stay issue. He has never had an issue until our first time in the Open Obedience ring, that's when this problem developed. As soon as I leave the room, he panics. Do you have any suggestions? I want to hear any ideas you have, so comment on this post (: