Unable to implement photo slider in theme template
What you did in your website is create a new content type that holds a static image for each entry. From what I see in the template link you posted, the theme you chose uses Nivo Slider as the default solution for a slider and even has an installation instructions link (which is not working).

My advice would be to follow the instruction on this link:
Nivo Slider Module, and install the module yourself. It will create a new content type for you to make the slider you need.