[Pebbled]

I've installed the sitemap generator and have imported the product and also configured the sitemap as per the default settings which assume http://www.xxxxxx.com/forum which work a treat, the generator generates the sitemap as expected.

Have just attempted to add the sitemap to Google using the following URL http://www.xxxxxx.com/sitemap_index.xml.gz via the webmaster tools, and encountered the following error:

1. I have created a Sitemap in a supported format. Help
2. I have uploaded my Sitemap to the highest-level directory to which I have access.
3. My Sitemap URL is: http://www.xxxxxx.com/sitemap_index.xml.gz
Example: sitemap.xml
General HTTP error: 404 not found
We encountered an error while trying to access your Sitemap. Please ensure that your Sitemap follows our guidelines and can be accessed at the location which you provided and then resubmit.

For information I am using vbadvanced as my homepage which links to the forum as per http://www.xxxxxx.com/forum and have set google webmaster tools to view http://www.xxxxxx.com rather than http://www.xxxxx.com/forum

I've viewed several of the earlier posts on here and have added the url for my site in the extra URL.txt page though assume it's not that txt file I should be modifying!

Apologies now, but I would appreciate it if you could provide me with plain and simple information on what I may need to alter in the files and folders because I feel like a fish out of water with these settings :erm: