Google+ Interactive Post Popup Disappears After 0,5 Sec

I'm creating this page http://kokas.x10.mx/?page_id=2 where I aim to send invitations through social media. The Google+ popup is my problem. Click on the google plus image, sign in

Solution 1:

You can't use a call to action url that has a different domain from the content url. You need to be able to serve them both from the same domain.