sunflow question

i have windows. trying to start sunflow render.
this is what i do:

D:\Program files\Blender>java -Xmx128M -jar sunflow.jar
Unable to access jarfile sunflow.jar

what’s wrong? do i have to set the path to the sunflow dir?

it looks like the first part of the README file is out of date. Later in that file, it says to launch with the following:

java -cp classes;janino.jar SunflowGUI

If you are using linux, use a : instead of a ; between classes and janino.jar. This is what I launch with:

java -server -Xmx512M -cp classes:janino.jar SunflowGUI