stopAllSounds()

hi guys :pleased:
i’ve a very simple problem but it’s very wierd too… (-:
i want to use this function stopAllSounds() in my presentation and it works for one button… but others buttons didn’t work i don’t know i tried everything to make it work but can’t understand why it didn’t.

i tried:
_root.stopAllSounds();
_root.myClip.stopAllSounds(); // to stop soound in this movieclip.

i want to tell you i using attachSound(); in my clip.