My WordPress xmlrpc.php file been blocked by my hosting due to some security issues. And because of that, incoming trackbacks will get 403 forbidden error. Thats why even you have linked back to my posts, there will no trackbacks appear in the comments.
To fix the problem, Techgurls had make a post about how to unblock xmlrpc.php from your website hosting. Just put this into your .htacess file and upload it in your root.
Let see how many trackbacks I will get after I upload the .htaccess file. :p