3D FlipBook - Perl script to create the HTML

I have got the FlipBook working in my webspace using a direct URL and static HTML and it works as expected. I now only want the page viewable after a user logs into the system. The same HTML is generated with the reference to the PDF and JS files amended to reference the correct locations. When you view source the hyperlinks for the PDF and JS files reference the files as expected - BUT the book does not load. Do the JS files reference other files?