to whom it may concerni purchased and installed 737ngx and enjoyed 2 weeks of bliss - such a superb product! Well done!I unfortunatly had my FSX installed in the default location, so ran into permission problems with my flightplanning software. So after 2 weeks of use, i decided to do a clean install of FSX and re-intall to a non defualt location (C:FSX) and i followed the pmdg instructions to the book. Upon re-installing my 737NGX my FSX crashes as soon as i select the 737ngx (it displays the 737ngx in the main aircraft window but it doesnt rotate it like it does tother aircrafts and then freezes and i get a windows fatal error message). All other aircraft run fine including my PMDG747-400.I have tried un-installing and re-installing as well as both SP's (SP1 and SP1b) but it simply crashes my FSX. All recommended changes to fsx.cfg have also been done. Afer the clean un-install, i was not prompted for my licesnse key again!!??Any assstance or pointers will be appreciated.Many thanks

1) Please sign your name in the posts2) Please advise the fatal error - You should be able to seee it in the event log of your OS.

1) Please sing the spelling of your name to the tune of Justin Bieber's "Break Your Heart."2) Confirm that you cleaned your registry as a part of the clean install of FSX. If so, what program are you using to do so?

hi allThanks for the reply. It appears that the issue was the activation of the program. Support sent me a re-activation file which worked swell. Thanks for the replies anyway.Rory Hickson