This article explains the reasons why you might get the following message from the web server:
"You are not Authorized to View this Page"
"HTTP Error 403 - Forbidden; Directory Listing Denied"
The principle reasons for this message are:
There is no default page for the server to display.
Ideally you should only have one default document. If you have more than one, the web server will choose the first one in the list and ignore the others.
The page you have requested does not exist