CoF, custom scenery and GPS

Hi all,Has anyone figured out why custom scenery won't show in the GPS display.The scenery loads fine, is visible, and in the same location as it was in 2K2, but the ICAO numbers won't show up. This makes it difficult to start flights from the custom scenery.I tried both a direct import from FSSC and the normal files and textures method to no avail. Both worked as far as the scenery load goes... it is there... just no GPS.The scenery is viewable and is checked as active....Any thoughts? Thanks, Jeff