Play/pause button help

Hi, newbie here.

Question about play/pause buttons; I’ve got a pause button which refuses to work. I’ve tried

 on (release) {
stop();
}

and

 on (press) {
stop();
}

but they don’t work. The play button works fine though. The file has music, so maybe that’s a contributing factor? Because I’ve tested the buttons without music and they work fine.

Another question: I want to know how to place a “Play” button before an animation.

Thanks in advance!