Sound not stopping

[Qwertygiy]

At my MIDI test place, I have a script that specifically tells the music to stop when the box holding the sound is clicked. It waits half a second, changes the music's Sound, waits another half second, and then plays it.

Here's the thing -- it doesn't stop.

Even when I type "game.World.Box.Soundtop()" in the Command box.

WHY?