On after pressing start flying to load up my 747, it goes to loading screen and does not start loading up i get the egg timer but waiting for the percentage to go up but no joy any help please Michael

Michael!Always start up a flight with the default Cessna. After standing at your prefixed gate and airport, then change aircraft in MSFS menu and choose your advanced aircraft such as PMDG, or other advanced aircrafts./ Leffe

When I want to fly the PMDG-737 I first load the FS9 default 737.When I want to fly the PMDG-747 I first load the FS9 default 747.Loading those simple aircraft with the same number of engines than the PMDG one you want to fly helps to avoid PMDG loading conflicts.Jose Luis.