[Plugin: Facebook Comments for WordPress] New posts not showing comments

I’ve previously been using Facebook Comments for WordPress without issue – awesome plugin! However, I’ve noticed that my last two blog posts (and any new test posts I publish) show the WordPress “Comments Closed” text. When I check the source the stylesheet for the plugin are called but the actual code is absent – it’s not being hidden, it’s just not called at all. Previous posts are still showing the comments correctly however…??

Any help would be greatly appreciated – I’m familiar with php and coding but nowhere near expert.

Thanks in advance

http://ww.wp.xz.cn/extend/plugins/facebook-comments-for-wordpress/