[Plugin: FeedWordPress] XML error

I my facing problem while syndication fields it is giving error as,
XML error: > required at line 2, column 11

I am using feedwordpress from last 4months it was working fine,but suddenly it is giving error on adding feeds and even updating existing feeds,,
plz help…suggest me the solution.

http://ww.wp.xz.cn/extend/plugins/feedwordpress/