[SOUND] Problem adding sound

Howdy.
Im not sure if this topic belongs in this section but i have a problem with sound.
I want to add a sound to a movieclip (enemy) on a certain frame, lets say frame 65 (where death animation starts) on the movieclip timeline.
The problem is that the respective sound plays from the begining animation of that movieclip and keeps repeating over and over, though i added a keyframe before the sound and i also selected Stream Sync.
So whats the problem because other sounds i added works just fine like intro on main timeline and stuff.
The movieclip has childs in array, not sure if thats important.

Thanks in advance for your answer.