The xml url given in the sitemap tab of admin panel seems to be broken as feedburner does not accept it and feed validator also shows error.
sitemap url :
http://1circle.org/sitemap.xml
http://www.feedvalidator.org/check.cgi?url=http%3A%2F%2F1circle.org%2Fsitemap.xml
error given by feedburner
The URL does not appear to reference a valid XML file. We encountered the following problem: Unknown feed format encountered (The root element is [Element: <sitemapindex [Namespace: http://www.sitemaps.org/schemas/sitemap/0.9]/>])
