Ah… now I think I know what you are using. You are using the Layer Slider, correct? Or the Widgetkit one? If it’s the LayerSlider, the developer changed a lot of things about the plugin, which means I need to update the tutorial. However, the two skins I made for the LayerSlider, celestial, and celestialcurve, go to this new location:
/ plugins / LayerSlider / static / skins /
If you are using the Widgetkit slider, then you need to upload the skin for that one; found in the theme download in a folder called Widgetkit.