Hi. I'm new to FS2004 and to add-ons especially. My problem is this: When I try to take off using one of the add-ons I downloaded (Firefox, F-117, B1B all come to mind), the airplane rolls over onto its left wheels and won't go into the air. It just rolls around until it crashes.
Is this a problem with my installation? The aircraft included with FS2004 don't give me this problem.
Thanks.
Trainee
Chief Captain
First Officer
,and if that doesn't work.... 
Captain