Autodesk Fabrication MEP Object Enablers for OPM SS6 (v

My question is more about the general usage of object enabler files.  I am working on a project with another design company.  They are using Autodesk Fabrication MEP to model plumbing piping.  I am using OpenPlant Modeler V8i (SS6) v to model process piping.

They have supplied me with their .DWG file, and several .EXE files for OEs from varying versions.  I have ran every one of them, but I still get the "One or more Object Enablers is missing" error when I try to open their .DWG file with my OPM.

Is there something I'm missing here?  Is there a certain place where the OE needs to be installed?  I just went with the default path (c:program files.../Autodesk...etc...).

Can anyone shed a little light on this for me?