I checked the PMD and PZ2 files you sent me, and there is no data for the left and right collars in either of those files. That explains why the morph injection is not working on the collars.

If you still have the OBJ file that you used to create the full body morph, you'll probably need to load it in again. Delete the first version. Then choose FIgure > Load Full Body Morph. Select the OBJ file for the morph and choose OK. You may also want to name it something other than Body 1 to avoid any issues with the existing BODY actor.