The Writer Directors Steven Kampmann and William Porter

When ever a watch a really great film I always go on IMDB and do a little research on it, I like to find out who directed it and who wrote the screenplay, I research this because I like to see what the writer and director did after this film so I can go and watch their future works, in this case the writer director team of Steven Kampmann and William Porter never made another film. I wonder what happened? They worked with some great talented actors, Mark Harmon, Blair Brown and Oscar winner Jody Foster. You would've thought they would have went on to make other films, but this was the one and only film they would make. Steven, William, if you're out there, what happened?????????????????