The way you have it setup, the recipe requires a stick and a sapling right below the stick. AddRecipe is shaped, the first two arguments in your new Object[]{} are telling it that the first layer contains R and the second contains W, the next ones tell what item each character should be, so the pattern you've created is:
If you use that in a crafting table it should work. it you're looking to do something like this:
please verify
If you use that in a crafting table it should work. it you're looking to do something like this:
then you should use AddShapelessRecipe.