Bentley Geospatial Administrator - Auto-Calculate X and Y Coordinates

Hello,

I'm setting up a geospatial schema (attached), for the first time, and I require a little help with using Auto-Calculate for the X and Y position of a point feature.

http://communities.bentley.com/products/geospatial/desktop/w/geospatial_desktop__wiki/3346.aspx

So I select my schema, open the drawing, and begin adding features.  The problem is when I place a feature, the Easting (X) and Northing (Y) boxes aren't updated.  I get following entry in each field, when reviewing the feature;

  • Expression handler error: -1

What I would like is for the Easting & Northing fields to be auto-populated.  If I move the feature later on, I would like these fields to automatically update.

Thanks for any help,

Nick.