[Plugin: Google XML Sitemaps] got this error after update

hi
i got this error when update xml sitemap plugin
on access my site map http://www.asf-mobiles.com/sitemap.xml.gz
http://ww.wp.xz.cn/extend/plugins/google-sitemap-generator/

here is screen cap
http://imageshack.us/photo/my-images/855/erroraa.jpg/
can any body help?

site link is