i need automatic login in facebook app

For step #2, are you logging into Joomla using a different account than the one JFBConnect created for you when you used Facebook?

If so, the "Connect" button should show. That allows the user to connect their Joomla account to a Facebook account.

If that doesn't help, can you explain more of what isn't working? What are you expecting? What happens?

Thanks,
Alex