Hi, when I start up my FSX anf select the CS 757 as soon as the panel appears i get an annoyingly loud 4 beep sound.  I went into the sound files and listened to every one of them and that soind is not therein.  The Autopilot disconnect sound is quite similar.....I removed it to see if it was the culprit but it was not.  So, can someone please advise me how to remove this annoying sound...and where it is.   Or even being able to reduce it sound level would be good.  

I also tried within FSX but no joy there either.

Would appreciate some guidance in this matter, thank you.

Seehunt