AHI prefs doesnt work, because it is the MUI version! It is a BB3 bug. What follows is the obvious bugfix.
If you are seen this:
BoingBag3 Bug fix for /prefs/AHI
You should simply delete AHI prefs from the archive, and so when BB3 is installed the old one, ReAction based will remain and work together with AHI 6.7.