Enabling Failures in FS2002

I have a 767-300 sitting on the ground at LPPS, due to be in EGCC in 2 hrs because of a tech problem! I enabled random failures during the air, as I had never tried it before in FS2002, but shortly after I did, I had an autopilot failure, Flight director failure, and the rudder went funny?!I had to fly her down and travel 100nm by hand!Anyway, why is this? I got to LPPS, my divertion, and "Repair all failures"...but it tells me that I had nothing wrong with the aircraft?I tried everything whilst I was up there, but I am putting it down to maybe a software bug or MY COMPUTER!? (most probably the latter?).Please:)