Hello Dave,
Confirm when APDL starts on your Pocket PC it shows version 6.1.4, also indicated in the Options...About dialog?
Try a soft reset on the device and then get the zip file from the Airline Schedule Importer site again, place the ZIP file in the /My Documents/APDL/ScheduleImporter folder on your Pocket PC and then run APDL or tap Options..Schedule Importer.