The bones and the groups have to have identical names. Each bone has a Name and an Internal Name. It is the Internal Name that has to match the name of the corresponding group exactly. The Name field is what shows in the body parts list of the hierarchy.

Make sure you have the latest SR for 2014 as well. I do all of my rigging in 2014 game dev and don't have this problem.

Rigging hasn't changed much since Poser's earliest days, it's just had some things added to it.