Preheat oven to 350 degrees. Grease and flour 9 x 13 pan. Sprinkle pecans and coconut in pan. Mix cake mix according to directions and pour into pan. In saucepan melt margarine and cream cheese, add sugar mixing well and pour over cake batter. Bake 40 to 45 minutes. Let cool and remove from pan or slice and turn upside down.