In the Assembly Room, they scale up the model to 'normal' size and leave the original model alone. If you go into the Vertex modeling room, and scale it up to the size you want, then go back to the Assembly room and in the objects Properties pane, you'll find it's 'overall scale.' Set that back to 100% (from wherever it is, probably 500% or more,) and everything should be OK. But do remember the advice about what size you scaled it by, you will need that to send it back to 'Poser-size.' Good luck!