I add my Articulate as a file after publishing it to the web, and zipping it.
The zipped Articulate goes to the content area in File. Next I unzipp it, delete the zip file and choose story.html file as the main one (all of these actions available when you click on particular files).
Than I make sure the Display option is 'In pop-up'.
It works really well for me, I hope you will find this method useful as well