Facebook Button not working for new posts

I updated your Facebook plugin a few days ago and I published a post the next day. Now the plugin still works for all my old posts, but for the new one that I published on December 21, 2012, new likes do not seem to show up in the Facebook news feed.

Here is the link to the affected page: http://samuraimarketing.ca/2012-evolution-of-seo-sem-internet-online-marketing-ottawa

Please advise.

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