That message means your server is having some sort of connection error with Facebook. "Resolving" means that your server can't translate domain names, like api.facebook.com to it's IP address to communicate with.
I'd recommend contacting your hosting provider to help them narrow down why outgoing requests from your server may not be working.
Please let us know anything you find or if there's anything else we can help with if you think the issue is specific to JFBConnect.
Thanks,
Alex