The first build on TFS - and I get lots of compile errors. Third party assemblies cannot be located

I am trying to run my first build using TFS 2010. The build fails because it cannot locate the third party assemblies such as AntiXSSLibrary.dll. W开发者_开发百科hat do I need to do to fix this?

See http://www.ewaldhofman.nl/post/2010/02/09/Where-is-the-AdditionalReferencePath-in-TFS-2010.aspx