What browser are you seeing this in? If you have a link that could help to picture the problem.
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This occurs in both firefox and internet explorer. this is the link to our blog. As you can see the the page listing is just a directory, and not the actual page.
http://www.cls.k12.oh.us/tech/techblog
What webserver are you running? If Apache, you have to get the DirectoryIndex set properly.
You will find this in the httpd.conf file as:
DirectoryIndex index.html index.html.var index.htm index.php
If you are running your website on a webhost and they support PHP, then they’ve done a very bad job of setting up your account.
Regards