I've had similar hangups in my development. I saw the
following line in the livedocs section on the File class that may
be of help: "The url property for this object uses the app URL
scheme (not the file URL scheme). This means that the url string is
specified starting with "app:" (not "file:" )."
With that said I would have your location value look
something like: "app:/cnn.html" (as it looks like the cnn.html file
is at the root of your application).
One resource that really helped me wrap my mind around the
whole local file access is
Houser's blog post on the subject.