[Plugin: Google XML Sitemaps] Problem showing sitemap.xml

Guys, i need your help. Previously i manage to install this plugin correctly. Then at plugin section remind me that this plugin already out with new version and i already updated it but now the problem is when i tried to see my sitemap, this msg is display :

Error loading stylesheet: An unknown error has occurred (804b0014)

http://mynewstory.net/wp-content/plugins/Google%20Sitemap%20Generator/sitemap.xsl

i’ve already deactive, delete this plugin and then reupload and activate it again (which i couldn’t do the first time build sitemap – the appearance at setting are same as before) but i’m facing this problem. Anybody know how to counter this issue?