I have a few slides in a presentation I am doing. I start an Audio clip as the presentation starts on slide One. Slide Two works perfectly and the audio clip continues. Slide Three is also fine, but before the end of Slide Three, the Audio clip is finished and instead of transitioning to the next slide, I get a white blank screen.

If I click the mouse, the transition starts and the next slide works. How can I make the transition to the next slide without having to click the mouse?