Flight Sim Crashes about 15% into loading.

Whenever I try to load the Portland International airport my loading gets to about 15% then the game just shuts down. Flashes back to my desktop. I have FlightZone's Portland scenery. It has never done this before until recently. The only mod i have made since it quit working was added Flight Enviroment to the game. Other default scenery airports will run just fine its just this airport that wont open? Any suggestions to what the problem may be?