I left you a note under your post in the expert forum, but in case you don't see that... Pure autonomic failure is classified under dysautonomia (autonomic nervous system dysfunction) and you can find our community on MedHelp here:
You would probably have better luck on the Neurology forum. Have you tried that yet? What exactly is this and how do you get it? Were you involved in some sort of accident or something? What are your symptoms????/