Help Troubleshoot Object Intersects Trigger

Hi Everyone, looking for some help here. I'll like to build a slide where the users can use buttons to move a large timeline up and down. Then as the timeline would get to each date on it, it would trigger a show slide where I would have either a video, a picture, or audio that would talk about that point on the timeline. I'm trying to use the object intersect trigger but, for some reason it's making everything on the slide disappear when the trigger is enabled, when you turn the trigger off then the slide appears and works as expected. Can someone help me with it? I'm attaching my test story.