ekordev what do you mean ? I can bring up the Facebook login modal just fine on your website. I didn't try actually logging into Facebook though.
I noticed your website is accessible via both HTTP and HTTPS. You should setup redirects so only the HTTPS version can be accessed, or use the Canonical Url extension to achieve it.
If you're trying to login with Facebook on the HTTP url, it's possible Facebook refuses to redirect back to the website because they require apps to use HTTPS in order to connect with Facebook.
