Can't sign into Game Center-tried everything I think....

Hi-I have ML installed and all seems to work just fine but I can't login into Game Center! It's not a blank green screen like many others have but I have a screen with my email address but I can't enter my password!

I have read through the forums and added some DNS server numbers to my network, deleted Gamekit, restarted. Deleted a 'gamed' plist. The only thing I didn't do was the terminal things-I don't do terminal. I am not comfortable in that environment.

So I am at a loss. I opened Game Center on my iPhone and can access it just fine there. Didn't resolve the issue of Game Center on my Mac.....

So, any who, any ti