Naming of Slides for TOC

Good morning,

Does anyone know how to name slides so that they show up in the table of contents? It's strange because it seems like I have done it but it won't show up in the TOC...is there some trick that I'm missing? As you can see by my pictures, I have names some slides in the properties panel, and their names show up in the filmstrip; however, it still said Slide 1, Slide 4, etc. in my TOC. Any ideas? Thanks.