Suddenly broken

Hello ,
I have been using this plugin since a long time, i have been always grateful to you for this plugin,all though since somedays i am getting an error when i check my sitemap :-
Error loading stylesheet: An unknown error has occurred (805303f4)
http://www.xxx.abc.com/wp-content/plugins/google-sitemap-generator/sitemap.xsl

http://ww.wp.xz.cn/extend/plugins/google-sitemap-generator/