Sounds like you didn't copy the morphs in the Body or just the body and not the rest of the groups.That is the whole point of loading a pose file first. The body morphs show up. They don't if you don't use the pose file. You need to make sure you have copied the body and all the other groups morphs.

If you copied all the other groups, they should be working. Select the chest or what ever group and dial it's morphs and see if they work. The head doesn't use PBM's so that's my guess why all the morphs work for it and it not right on the body.

I wrote a tutorial, step by step for MM but I can't remember where I posted it of if I just e-mailed it to someone. If I find it I will send it to you if you need it.