1. In a large bowl, dissolve one package of raspberry gelatin in 1 cup boiling water. Stir in 1 cup cold water. Pour into a 13-in. x 9-in. dish; chill until set. In a small bowl, soften unflavored gelatin in the remaining cold water; set aside.
2. In a large saucepan, combine cream and sugar; whisk over medium heat until sugar is dissolved. Add cream cheese and softened unflavored gelatin; cook and stir until smooth. Cool. Stir in pecans and vanilla. Spoon over raspberry gelatin. Refrigerate until completely set.
3. In a large bowl, dissolve second package of raspberry gelatin in remaining boiling water. Stir in blueberries. Carefully spoon over cream cheese layer. Chill several hours or overnight. Yield: 12-16 servings.