Bug or my fault!

Hi, this problem didn’t i have in Flash MX but it came up now when i used flash mx 2004… if u have a full scene with animations and stuff… and make a symbol there, for example a movie clip… and in that movie clip you make some more animations… like a buttons and u know further… but even if u make an action in the movie clip that says STOP() the move clip animations plays on when you play the whole scene!! why is it that way…never been that way before… hmm… please help