Share 'Problems with Raspberry Fondant'

I've been making chocolate at Christmas time since 1990. Someone gave me Candymaking by Ruth Kendrick. I've used many of the recipes with great success. However, the Fresh Raspberry Fondant has only been successful once in 1995. Every year I try it and it never has set up well since then. I've tried fresh and frozen raspberries, leaving out the corn syrup and leaving out pinch of baking soda, but…