About FakeBasicAuth

Hi, I'm trying to do the following. When users from the Intranet access
to the website nothing will be required but if the users come from the
Internet a client certificate will be required to use it with the basic
authentication using the FakeBasicAuth option. I did what the link
http://www.modssl.org/docs/2.8/ssl_howto.html#ToC10 says but if I come
from the Intranet a client certificate is required (if cancel it I get
access to the webste) and if I come from the Internet a login box pops
up.  

Could you help me?