CMS The requested URL /content.php was not found on this server. error
 

Hi,

Unregistered members who view the CMS encountered this error:

"
Not Found

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Apache/2.2.11 (Unix) mod_ssl/2.2.11 OpenSSL/0.9.8e-fips-rhel5 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 Server at www.xxx Port 80"

Anyone can advice?? Seems to encountered this after upgrade to 4.0.1? When I log in then I can view the articles in CMS. I have enable the permission for unregistered to view the articles.