Accessing the website by name

I created a website name http://websitename and associated this with the IP for my FileVista website. When the page opens up it shows <dir> FileVista and <dir> Root. I know to add Filevista at the end of the website name to get to the login page, but I don't want nosey people looking at the Root folder. How can I make sure that the Root folder stays hidden if the user removes FileVista from the URL.

OK, I turned of Directory Browsing. It is working fine now.