Moving slider based on variable adjustment

Hello,

I've built a slide that has a slider and multiple layers. As the slider is moved a layer is presented. Once all of the layers have been visited I want the slider to automatically move to the final position. I've been trying to do this by adjusting the slider variable on the final layer so that the slider is moved to the final position when the timeline on the final layer starts. I can't get it to work. When I go back to the slider from the final layer, it hasn't moved at all. In my variables list, 4 of them are slider variables but I only have one slider in my entire presentation. I was assuming I just needed to adjust the slider variable that shared the same name as the slider variable in the slider toolbar. Is that wrong? What does the slider variable trigger need to look like in order to get the slider to move on its own? (I've tried adding 1 value, having it equal the value of the final position...) not understanding where I'm messing it up. Thanks for your help!