Ready for the trick?
For your own peace of mind, NEVER cut-and-paste an internal URL.
Yes, the link box, once you browse to the File Manager or the Site Map and click on a selection shows an absolute address. Yes, it's tempting to bypass that process by pasting an address that already appears on the screen.
But following the rules generates a relative url, no matter what you see in the box. And pasting generates an absolute url.
If you are certain you have followed the rules, try this:
1. go back in, delete the URL and follow the rules again.
2. CLEAR THE CACHE.
3. Try manually removing "homeadmin.army.mil/[yourgarrison]/index.php" from the URL field.
4. Finally, log in to home.army.mil/[yourgarrison] and clear the cache there. Remember, everything is temporary in there. Don't try editing anything else.
If 1 or 3 works, you might have pasted. If 4 works, you did not give the two sites enough time to synch.
If none of the above works, you will probably have to try another block: A File block works every time. So does List Files From Set.