I am also an XP9 user and absolutely love this sim.
I'm sure you've checked this already but just in case you haven't, look to make sure that you do not have any timed failures set. A timed failure would explain the engine fire and bird strike once you are already into the flight.
Other than that I guess the other option would be to reinstall the program. As daunting a task as that seems, it may be your only option.
As for getting a new cd/dvd, I strongly doubt that would help your problem in this case.
Hope this helps and I hope you sort out your problem!