Can you explain a lot more about what isn't working? Are you seeing an error message, is information not being imported properly? Any information you can provide on the issue will help us determine a solution faster.
I went to your Forums > Forums (New) menu item and used the SCLogin module on that page. From there I was able to create a user and log in with Google.
What is the specific URL that you are trying to log in from and what browser are you on? Have you tried creating a new user from different Google accounts?