Ok, I've pointed my browser to the url that I gave google and it opens a download box (I assume this is correct) but I am still getting the error when I submit to google. They crawled the sitemap again an hour ago and it says sitemap general http error:
Error Detail
HTTP error The server returned an error when we tried to access the URL provided. Please make sure the Sitemap URL is correct and resubmit your Sitemap.
I don't know what I'm doing wrong?