Question on how to make a slide show play

[DH24]

First off I hope this is in the right place.

Aright, I have a created a slide show as a movie clip and then I have inserted on stage. I have created a button and everytime the button is clicked I want the movie clip to advance one slide but I am not sure what code to use to make it to do that

Can anyone help me out?

Thanks!

[atomic]

http://www.kirupa.com/developer/mx2004/xml_flash_photogallery.htm