I have a SharePoint web app (let's say http:// providers), wherever I try to access this app (which only contains the root site collection) I get an "You are not authorized to view this page" IIS error.
Now I only have a couple of users who get access (but no Full Control permissions) on the site.
I changed the primary site collection administrator to my user account, then I modified the web app directive from the central administration and added my account with Full Control permissions and the error still appears.
What can I do to have acccess to this site? Should I restart IIS service or something to make it to work properly?