Rss error HELP

I have errors of rss

• WordPress Blog : RSS Error: WP HTTP Error: Could not open handle for fopen() to http://ww.wp.xz.cn/news/feed/
• Incoming Links: RSS Error: WP HTTP Error: Could not open handle for fopen() to http://blogsearch.google.com/blogsearch_feeds?scoring=d&ie=utf-8&num=10&output=rss&partner=wordpress&q=link:http://markovsajt.co.cc/wordpress/
• Other WordPress News: RSS Error: WP HTTP Error: Could not open handle for fopen() to http://planet.ww.wp.xz.cn/feed/

How to fix this my WordPress Blog adress: http://www.markovsajt.co.cc/wordpress/