Sirs: I have a problem, what I think is a CTD. The program refuses to run past Free Flight. I get the following error messages "A Fatal Error has Occurred" "MS FSX has stoped working" Then the Program re-starts. I recently installed PMDG-NGX 737 800/900 Base Pack . And the Update ( As instructed in the Forum). Less than 3 hours ago I downloaded the PMDG 737 600/700 w/ succesfull Activation. And the Program refuses to load. Should I disassemble it all and then install the Update ??? (Like the forum instructs) "I need a litle info on the order to assemble these 2 programs and the Update" Thank You Very much.........