Storyline to sharepoint: clicking the story.aspx file just downloads the html code

Currently testing running storyline applications from Sharepoint. After I publish to web, I open the file and convert the .html file types to .aspx, and then upload all files to a sharepoint document library. 

When I click the story.aspx link, however, a blank browser opens and the my computer auto-downloads the .aspx file/original html code.

A web dev in my company was able to upload a storyline file application successfully. When he clicks the story.aspx link, it directly opens the application in a brower. 

Any idea what could be causing this for me? Thank you.