I have the following error while trying to connect / create team project in visual studio 2008 SP1 BIDS to team foundation 2013. How do I upgrade the Team explorer in VS 2008 with new version to connect to TFS 2013?

thanks
Nick
You cant. Visual Studio 2008 connecting to TFS is no longer supported. You can however install the MSSCCI provider to allow down level source only connection.
http://visualstudiogallery.msdn.microsoft.com/06c8e056-7f77-4a5c-9b8b-49318c143df8
In order to be able to create a new Team Project against TFS 2013 you need to install the 2013 version of Team Explorer. It resides within the VS 2013 shell so if you can I would recommend installing VS2013.
Team Explorer 2013: http://www.microsoft.com/en-us/download/details.aspx?id=40776