Disabled Show All Files Button

[Mark06]

Hi, for some reason, the "Show All Files" button in my solution explorer is disabled. I started a new Website project, selected ASP.Net, filesystem, in C#. But no matter where in the solution I click, I cant click this icon, its disabled. PS: I'm actually following a webcast, and it starts by manually pasting some files into the project directory, clicking show all files, and then "including" them in the project. Any ideas?