If you can see this message your browser is not running Java,
something it MUST do if you are to view this CAD drawing.
Netscape 3.0 and Internet Explorer 3.0 (or above) include Java
support. If you are using Netscape, you can enable Java
under meun item: "Edit->Preferences->Advanced".
With Explorer it is probably somewhere under "Security".
Once this is done reload/refresh the page and the drawing