Combine 1 tablespoon sugar and flour, sprinkle over bottom of pie shell and set aside. In a medium saucepan, bring corn syrup, brown sugar and remaining sugar just to a boil. Remove from the heat, Stir in margarine until melted. Let cool for 3 minutes. Gradually stir in eggs into hot mixture. add walnuts and mix well. Pour into pie shell. Preheat oven to 350 degrees. Place pie in oven, immediately reduce heat to 325 degrees . Bake for 55 minutes or until top is browned or center comes out clean with a toothpick.