Забери в 3-х местах Allow all
Должно быть(у меня так работает):
# Restrict access to the server...
<Location />
Order allow,deny
</Location>
# Restrict access to the admin pages...
<Location /admin>
Order allow,deny
</Location>
# Restrict access to configuration files...
<Location /admin/conf>
AuthType Default
Require user @SYSTEM
Order allow,deny
</Location>