A few things to look at:

1. Some INJ poses inject the dials but don't set them.  You need to then set the dials manually.
2. If the INJ poses were made with binary morph targets you need the free InjectPMD script from here:  www.4shared.com/dir/4851309/fc76215/DS_Plugins.html
   The DS3.0 version just installs and then works automatically; the DS2.3 version has to be run first instead of clicking on the INJ pose.