1. In a bowl, beat cream cheese until smooth. Add sugar and vanilla; mix well. Add egg; beat until smooth. Spread over bottom of pie shell. Chill 30 minutes. In a bowl, beat filling ingredients until smooth. Carefully pour over the cream cheese layer. Cover edge of pie with foil. Bake at 350° for 30 minutes. Remove foil; bake 25 minutes longer. Meanwhile, mix flour, brown sugar and butter until crumbly; stir in pecans. Sprinkle over pie. Bake 10-15 minutes more or until a knife inserted near the center comes out clean. Cool on a wire rack. Store in the refrigerator. Yield: 6-8 servings.