"The Specified Package not applicable to the image" DISM

Just like the title says, when integrating language packs in "boot.wim" to create a multilingual installation of Windows 8, DISM shows an error when adding the package. I followed the instructions here: Walkthrough: Add Multilingual Support to Windows Setup (http://technet.microsoft.com/en-us/library/dd799268(WS.10).aspx). THIS IS THE ERROR: Processing 1 of 1 - Adding package...