Do you have the "Couatl powered plugins" menu under the Addons menu ?
If not, perhaps is the couatl.exe that hasn't been launched, which can be checked very easily, by opening Task Manager and checking if there's a process named Couatl.exe that starts automatically when FSX starts, and quits when FSX quits.
If that exe hasn't started, you can even start it yourself manually, by launching the Couatl.exe from the FSX\Fsdreamteam\Couatl folder with FSX already running. If the additional menus and ParkMe feature would appear, this would at least verify the module works. If it hasn't started automatically, might just be with a problem with updating the EXE.XML file, which should be an easy fix.