In 12-inch skillet, melt 1/4 cup butter over medium heat. Add hens; cook 8 minutes, turning once. Place hens on top of grapes in roasting pan. Reserve 1 tablespoon drippings in skillet. Stir flour into drippings with whisk until smooth. Gradually stir in wine, 1/2 cup orange juice, the apple jelly and 1 teaspoon of the salt. Cook over medium-high heat, stirring constantly, until jelly is melted and sauce is reduced to 2 cups. Remove from heat; reserve 1 1/4 cups sauce for serving.