I purchased a new version of PMDG for P3DV4, and installed the updates. P3DV4 loads fine and works well with the default aircrafts. When I change the aircraft to the PMDG 737, the plane loads, and goes through the 18 second initializing phase. A little bell sounds once the initialization is complete. About 10 seconds later, the screen changes to the plane being on the runway in crash mode. (The plane crashes - not the computer). I do not touch anything, not the mouse not the keyboard, not the yoke, throttle etc.. The screen just changes on its own. It then reloads back for initialization, then crashes again on the runway.
Please let me know how to correct this.