Sitemap in google webmaster tool returns 404 errors

Hi,

I’m using this plugin and it is very good. But if I create the xml sitemap (http://www.intraworlds.de/sitemapindex.xml) the google webmaster tool gives me these errors. But i have excluded these from sitemap in setup.

general error HTTP: Chyba 404 – not found
File Sitemap: http://www.intraworlds.de/post_google_news.xml
Error HTTP: 404
–
general error HTTP: Chyba 404 – not found
File Sitemap: http://www.intraworlds.de/taxonomy_media-category.xml
Error HTTP: 404
–
general error HTTP: Chyba 404 – not found
File Sitemap: http://www.intraworlds.de/post.xml
Error HTTP: 404

I’m stuck and don’t know what to do else. Please help.

Thanks for any advice.

http://wordpress.org/extend/plugins/bwp-google-xml-sitemaps/