mod_autoindex not all folders

Hi there, this one has me boggled so I'm hoping you can help.
I'm running 4.1.7

I've modified my /etc/frontview/apache/Virtual.conf and added a my-virtual.conf to /etc/frontview/apache/addons as detailed here http://www.readynas.com/forum/viewtopic.php?f=35&t=35896 to stop the webshare appearing my URL(s). Virtual.conf and my-virtual.conf copied below.

This change went fine and it works a treat.

My problem is that some folders in the /web/ directory (where I keep my web files) have indexes and some are just folders of files that I need to access without an index.
My my-virtual.conf file has "Options Indexes" listed but when I web surf to those index free folders I get "Forbidden You don't have permission to access /apps/ on this server."

Shouldn't mod_autoindex generate a directly listing or is it not supported on the ReadyNAS?

Cheers for any help/ideas you fine folks can offer.

Virtual.conf

NameVirtualHost *:80

<VirtualHost *:80>
SSLEngine off
RewriteEngine on

RewriteRule ^/admin/(.*)$ https://%{SERVER_NAME}/admin/$1 [R,L]
</VirtualHost>

my-virtual.conf

<VirtualHost *:80>
ServerName http://www.the-liberator.net
DocumentRoot /c/web
<Directory /c/web>
Options Indexes
Order allow,deny
Allow from all
</Directory>
<Location /index.html>
SetHandler none
Order Allow,Deny
Allow from all
</Location>
SSLEngine off
</VirtualHost>