NG causing CTD

I've never had any problem with the NG before this. I have both the 737NG and 8-900 series. I reinstalled FS9 recently and I loaded my usual addons (MyTraffic 2004, EditVoicePack and LevelD 767) and then I installed the PMDG 737 series (NG then 8/900 series), followed by installing the NavData package. All went smoothly until I tried running the sim.Every aircraft works flawlessly except for the PMDG 737. The Airac database loads fine however when I click FLY now, I get the usual window