Unless some moderators and readers of the forum are web design experts and are able to help you, you might want to post on a forum that specifically addresses web page design to get some qualified answers. I'm far from being one.
A person who asks a question is a fool for five minutes, a person who doesn't is a fool forever...
Providing some more info would be helpful, as well. Where are you hosting? Is this some professional hosting place, a friend with a unix server, or are you running windows web server?
Are you able to pull up other files in the htdocs folder? Make sure you have your capital letters correct.
Make a link to the file and see if you can do a 'right click > save as'.
The invisible man is blind. If light passes through a body without being affected, then it cannot be properly refracted by the lenses. It won't be focused and he will constantly see a blur of random colors as lights hit the rods and cones from each direction.