That's what I thought. The freehub body you have does not accept a Hyperglide-C 11t cog. Here's the difference (Hyperglide-C left, Hyperglide right):
Remove the lockring and take the sprockets off and you'll see that the end of the splines go to the very end and doesn't provide room for the 11t cog to slide on far enough to pinch the rest of the stack.