Geopak - Google Earth


I am using Power Geopak v8i SS4.

I have a dgn file set to South Carolina, State Plane, Feet, coordinate reference system.  When I create a KMZ file to display in Google Earth, I do not get the correct location.  However, I have the tools->options in Google Earth set to Feet, Miles.  However, it appears Google Earth is using meters, and/or some other coordinate reference system such as WGS?