Sub Folder Indexing - Forbiden error

[Ray]

Or consider using Offline Mode if you have a copy of all the website files on your computer and you do not have any dynamically generated pages (e.g. no PHP or ASP pages)

[David]

Your server probably forbids directory listings. So you probably need to start indexing on an actual web page, which should link to the other pages. e.g.
http://www.mywebsit.com/MyFolder/start.html

Or you could enable directory listings on your server. Or use a directory listing script.

See also this FAQ
Q. I am indexing with spider mode but it is not finding all the pages on my web site

[Ram1500]

Instead of indexing a URL such as http://www.mywebsit.com/, can I only index a sub folder such as:

http://www.mywebsit.com/MyFolder/

I have tried this but get an error "Forbiden"