Comments on some posts not working

Hellow I have metromag wordpress theme and I am using this plugin. This plugin worked fine but now in some posts comments are not showing and on some pages comments are working fine my site is thasite
post showing fb comment is thasite hijrat trailer
a post where no comments is news
Please help me to solve this.

http://ww.wp.xz.cn/plugins/facebook-comments-plugin/