I just installed wordpress and when I run index.php, all I get is a page that says "Index of \wordpress" and it lists the contents of my wordpress folder. I first created a SQL database and a SQL user. I ran the ./wp-admin/install.php and it succeeded except for the above problem. I have checked my wp-config.php file and it all is right. I installed WordPress to a sub directory /public_html/wordpress. What do I check next?