If the .jar file is not working for you, there are 2 things that you can do to fix it.
#1: Install JDK 7. Most people need this to play RavagedScape.
#2: Make a new folder and extract the .jar in it with winrar. Then use the .bat file to run RavagedScape. (Windows only)
If this still doesnt work for you, im sorry u cant experience such a great server
