View (heads up), Orientation 3d view and 3d webiste options unavailable

Hi,

i'm using Solidworks 2011 and recently noticed that there are 2 extra options 3D_view and 3D Webiste in the Orientation 'drop down' box below the standard orthogonal views and now they are unavailable unless opening up a model where they were viewable. See below.

Is their an option setting that I need to tick?

Best Regards

Grant

SolidworksAssemblies