Google gives General 404 error

[houseoweb]

Hi,

I created a sitemap and put the following code in my .htaccess file:

RewriteCond %{REQUEST_URI} ^/sitemap.xml
RewriteRule .* /index.php?option=com_xmap&view=xml&tmpl=component&id=1

As a result of the code, I am now able to access my xml sitemap by www.houseoweb.com/sitemap.xml.

However, when I submitted to google webmaster tool, it gave me the following error:

We encountered an error while trying to access your Sitemap. Please ensure your Sitemap follows our guidelines and can be accessed at the location you provided and then resubmit.

General HTTP error: 404 not found
HTTP Error: 404
-
Jun 26, 2012

Any help would be appreciated.