Can you describe more about how you're trying to login with SCLogin or JFBConnect? Are you authenticating with a social network? If so, which one? Or, are you logging in with standard Joomla credentials?
I just tried with my Facebook credentials and my account was created with my profile being properly imported. It took a little longer than I'd expect (about 10-15 seconds), it worked.
If you are having issues with social network authentication, please enable the "Debug Mode" setting in the JFBConnect -> Configuration area. That may help show some error messages that are occurring during login.
Thanks,
Alex