Slide Show Image Dispears 3 Minutes After Slide Show Is Stopped - Why?

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I have created a slide show with a stop button. The buttons stops; but after about 3 minutes of being stopped, the image just disappears and all I see is the movie's background. Does anyone know why this is occuring? If so, is there a quick fix for this issue?

PS: I used one of the goToAndPlay Key Frame events built right into my software; I assume it was this (to make movie stop):

on(release) {
stop();
}

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After 3 minutes of seeing the background; the image displays again. Then 3 minutes later; it disappears again. It just keeps on doing this, over and over again.

Does anyone know why and/or how to stop movie/slide show from doing this?