BaseCustomLayer Draw() use of IProjectedCoordinateSystem5

Discussion created by Smcneil1 on Apr 11, 2012
Latest reply on Apr 11, 2012 by Smcneil1
Using Arc 9.3.1 & VS2008.

Having trouble with converting spatial reference to PCS on a new development system only.  This worked fine on my previous development system (XP), and works fine on a production system (Win7).  But on the new system the conversion to PCS below always returns a null object reference.

    public override void Draw(ESRI.ArcGIS.esriSystem.esriDrawPhase drawPhase, IDisplay Display, ESRI.ArcGIS.esriSystem.ITrackCancel trackCancel)
      if (!m_bValid || !m_visible)
      if (drawPhase != ESRI.ArcGIS.esriSystem.esriDrawPhase.esriDPGeography)
       IProjectedCoordinateSystem5 pcs5 = Display.DisplayTransformation.SpatialReference as IProjectedCoordinateSystem5;

      // then the work is done which just puts markers on the map

Any ideas on why this is broken on my new development system?  

Thank you if you can help!