Robert,
We didn't forget about you. Sometimes, it can take a day or two for a response as it takes time to diagnose issues.
First off, and unrelated, your page uses both www and non-www. When I got to your site and login through the www domain of your site, then click the Invite link, it's for the non-www domain.. and I have to log in again. That's a server configuration issues we'd recommend you look into for a better user experience.
The reason the Invite URL seems to be failing is because the "Inviter Thank You URL" is set to "
www.yoursite.com/thankyou". You'll need to set this to a page on your site. Specifically, Facebook checks to make sure this uses the same domain as configured in your application, plezilakaytv.com.
Hopefully, once you fix that issue, you'll be fixed right up. If not though, just let us know and we'll see what we can do from there.
Thanks,
Alex