Scratchy sound after publishing website


I use CS4 Flash 10.0.2 and after publishing a website (tried few templates), it comes out with bothering scratching/metallic sound. Basically all sounds, effects are distorted with a metallic sounds. If I do it few times, or shut down Flash and start it again and then publish it, the sound it is OK.
What am I doing wrong or is it a setting that I should do to avoid this nuisance, please?

It does not matter if I publish it with Flash v6 or v8 and moreover, it happens to different flash websites while using Flash CS4 for Windows and also for MAC. It must be something that I have to set but have no idea. Please help.