Error Page on FB in sharing SFC and FB application page

Hi!
I have installed SFC and also created an Facebook application page so I could share my posts to my Facebook page.
But when I wanted to share it on my Facebook profile I just got an error page on Facebook.
Moreover I allowed the “like” button to display after the substance of my posts but it is not displaying.
May be I have a problem either this plug in or the Facebook side.
Please give me a solution. Thanks in advance.
