Zero elevation?

[sunrise26]

First, I apologize to Ian for taking so long to respond.

To be a bit clearer about what I'm trying to achieve, I am designing a bungalow styled house where you typically have those wonderful independent porch pillars out front. They are seperate from any floor plan since they are sitting on the exterior. In fact they are between two floor levels. The first floor and and their own foundation system.

I have created in AutoCAD a complete porch pier from bottom of footing (-68) to top of plate (+108" above "0") where a horizontal beam would interface. My interface elevation in AutoCAD for this model is 0,0,0 and is placed where I assume CA would acknowledge being elevation "0" or top of sub-floor at 0" (8" footer + 48" to top of mud sill + 12" to top of sub-floor = 68"). When I import through the "Symbol Wizard" my AutoCAD model does not come in at the correct elevation. I am loading the symbol in the foundation plan. It's still not coming in at the right elevation. What am I doing wrong?