Statistics on which pages on my site users have Facebook-liked

I have Facebook "Like" buttons across my site and I'd like to 开发者_运维问答see which articles get the most likes. I tried "Insights for your Domain", but I keep getting this error:

The application ID specified within the "fb:app_id" meta tag is not allowed on this domain. You must setup the Connect Base Domains for your application to be a prefix of http://rapgenius.com/.

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I think you need to go to http://www.facebook.com/developers, enter app settings, switch to "Web Site" tab and enter rapgenius.com into "Site Domain" field.