problems with fs2002

i have a problem with my fs2002 pro. ;( 1: the prob began as i started to repaint one aircraft. the aircraft was correct displayed in fs and i could fly this. but, somtimes during go around with my coolie hat or just during the flight or after landing, the fs crashed to desk. also i modified the panel.2: then another problem occured: i have several planes installed (small bizjets like lears and beechjet). now i dont have engine sounds in fs. all the other sounds like gearwarning, flaps, a/p disconnect and so on are still working.3: after installing flightmax, fs wasn