TFS 2012 from VS 2010 - disabled the Add button in Group membership window

Hi All

I am accessing TFS 2012  from Visual Studio 2010 and try to add a new user to the Contributors list.

Right click project from Team Explorer -> Team Project Settings -> Group Membership

Select the Contributors group from the listed Groups.

Team Foundation Server Group Properties window openned with disabled Add, Remove buttons.

Environment: TFS 2012 Update 2, Windows 2012, not in any domain

Client: VS 2010, not in any domain

Thanks in Advance

Ambily

Assistant Consultant