Flash slide presentation, anybody use this?

I have the lovely task of working in a Flash slide presentation file. This uses the mx.screens.Slide class and I am having some trouble getting an action to work.

I am able to go from slide to slide through the behaviors, what I cant figure out is how to go to a particular frame in the timeline of a slide. I have been using code below and it works, just not when I try to add a keyframe number to it, any suggestions would be really appreciated.


on (release) {
	if ((_root.presentation.slide4 != undefined) && (_root.presentation.slide4 != null)) {
		var screen = null;
		var target = this;
		while ((screen == null) && (target != undefined) && (target != null)) {
			if (target instanceof mx.screens.Screen) {
				screen = target;
			} else {
				target = target._parent;
			}
		}
		if (screen instanceof mx.screens.Slide) {
			screen.gotoSlide(_root.presentation.slide4(1));
		}
	}
}

This is the section thats troubling me, you can see I am trying to go to a particular frame in a slide.

screen.gotoSlide(_root.presentation.slide4(1));