NEED KEYNOTE HELP

[BLDun]

I am working my way through Keynote and so far I like it a lot. Question: If I want to play a song through a presentation but don't want it to start until the second or third slide, how do I set it to make this happen? I can't seem to do better than making it start with the first slide??
Thanks for your help!

 

[Darwin]

I see what you mean

In the Inspector I thought that I was importing the music just for that slide but it seems to play throughout the entire presentation

I'm interested in finding out how to do this aswell