Preheat oven to 375°F Grease and flour 13x9 inch pan. Sprinkle coconut and pecans evenly over the bottom of the pan and set aside.

In a large mixing bowl, mix cake mix, water, oil and eggs as directed on the box. Carefully pour batter over coconut and pecans in prepared pan.

Mix melted margarine, cream cheese, and powdered sugar in large bowl on low speed for 30 seconds, or until well mixed. Increase mixer speed to medium and beat 30 seconds more, or until smooth.

Spoon cream cheese over batter, leaving a 1-inch border of batter around the sides of the pan, and smooth with a spatula.

Bake for 43-48 minutes, or until the cream cheese mixture has turned golden brown and the cake springs back when touched lightly.

Remove from the oven and let cool for 20 minutes. Run a sharp knife around the edge of the cake and invert it onto a serving platter. Let rest for 20 minutes more, then slice and serve.