DirectoryPacker.mfx Problem

Hi there. When I'm trying to open Knytt Stories source file, error message just pops up and says 'Cannot load extension DirectoryPacker.mfx', though I have it installed. Where could the reason be?
MMF2 Standart, build 239

Try updating to the latest build (build 249)... build 239 is very old.
DirectoryPacker.mfx probably only works with the latest builds.