RequestDispatcher null

[Russ White]

using Orion 1.3.9

I have some servlet code that does something like this:

String uri = request.getRequestURI();
ServletContext sc = this.getServletContext();
RequestDispatcher rd = sc.getRequestDispatcher(uri);
rd.forward(request,response);

When it executes the RequestDispatcher is null.

why?

Is there another way to do this?