can you show me your "ruleset.xml"?
I had similar problems when I had an error in there (invalid XML). You have to be extra careful that it is valid UTF-8 too. I already got a problem because of an invalid umlaut,
I figured it out. I was specifying a path to the rulset.xml file while creating the jar. When I extracted the Jar file, ruleset wasn't in the root and it was in c_\users\.... So I copied ruleset.xml to the same folder jar.exe was and created the jar file. It then worked!