Can't login to codeplex TFS via Visual studio 10

I use codeplex.com to host my projects. Some days ago I connect to codeplex successful via visual studio ultimate 10 but now I can't. Could you help me please? Below is the screen shot of the message I received from codeplex.

PS. You could see my discussion in CodePlex Information and Discussion here: http://codeplex.codeplex.com/Thread/Vi开发者_StackOverflow社区ew.aspx?ThreadId=240384

Thanks. Binh Nguyen

Now codeplex runs again. Sometime it deads, sometime not.

SO BAD!