Unable to connect to TFS 2013 from windows client

Hi,

I have added a windows user, developer 1 into a contributor group of a project in TFS 2013 server.  Both the Active Directory and the TFS server are in same domain.  However I am not able to connect to the tfs server in VS2013 in windows 8.1 client.  I can only connect to tfs server if I use the VS2013 in the server.

Can help?  Thanks.

Regards,

Celia