www.wysiwygwebbuilder.com

I have a folder containing a web page index.html that redirects to another page. When I type in the browser the URL of that directory without specifying a file name, I expect it to open the index.html which redirects to the intended page. But when I open a directory in any of my browsers (Chrome, Firefox), the directory structure/tree is shown instead:

Myahbe the landing page on the server is incorrectly configured?
Or maybe you have used uppercase characters in the name?