In large resealable plastic bag, combine the flour, salt and pepper. Add ribs in batches and shake to coat. In a large skillet, brown ribs in butter. Transfer to a 5 quart slow cooker. In the same skillet, combine remaining ingredients. Cook & stir until mixture comes to a boil; pour over ribs. Cover and cook on low for 10-12 hours or until meat is tender (falls apart with a fork).