When executing your game from your server please check for errors in your browser.
If an image don't appear, it's possibly because the browser can't find it and/or the file was corrupted while uploading to the server.
When executing your URL you gave, my firebug indicates 3 files that return "NetworkError: 403 Forbidden"
Generally 403 error means that the file can't be accessed/is in a restricted folder of the server.
It has nothing to do with Construct 2 but with your hosting.
As firefox allow for less JS errors on execution than Chrome, that's why the execution won't go further.
The authorization you give is to allow offline gaming and is unrelated to the rest of the execution.
Make sure the missing files are uploaded and are available for download and all your issues should be fixed.
Also, rather than bumping your thread (posting several posts in a row) prefer using the "Edit post" post option.