You need to properly name your files and folders in order to get the web server to interact properly with the browser. Remember that the web is meant to work across many different type of computer platforms, and in order to do this some rules need to be applied to files and their names.
Convention dictates that file names be in lowercase on the web.
Actually mixed and uppercase are perfectly permissible, but it can lend to confusion in finding URL's. So do not use spaces in your file names. Suffixes You should follow the accepted convention of using .html or .htm for your files. If you decide to use the PHP scripting language in your html source, you must use either .html or .php3 for the PHP to work. The default page is the one that comes up automatically when the browser requests the folder name.