Display Storyline on Sharepoint Site

I came across this thread hoping that it would help -- I had the same question as the original poster.

I have set everything up exactly as you've suggested. When I open the story.html page, however, the player does not launch. Instead, my browser prompts me to save the file. I have the same results using numerous browsers and multiple computers. I can confirm that I have published for Web and that I have dragged all folders/files in Explorer view to a SharePoint site that I'm the owner of.

Is there anything in the publishing procedure that I'm missing?