leap motion java sdk - max closes when running mxj

Hello.
I'm trying to write a Java External that can work with the Leap Motion
device.

in max.java.config.txt I configured the following:

max.system.jar.dir /Volumes/2g-storage/projects/java-projects/jar/

this points to

LeapJava.jar libLeap.dylib libLeapJava.dylib

and I configured

max.dynamic.class.dir
/Volumes/2g-storage/projects/java-projects/leapmotion/piano/bin/

which points to the compiled classes

now when I fire up max and try 'mxj MaxLeapMotion' the program just quits.
it doesn't show any segmentation fault error to report,
it just closes.

about support information:
{
"version" : "Version 6.1.3 (ac9dafd)",
"platform" : "mac",
"arch" : "x64",
"osversion" : "Mac OS X Version 10.8.4 x86_64",
"samplerate" : 44100,
"iovs" : 64,
"sigvs" : 64,
"scheduler_in_audio_interrupt" : "off",
"audio_drivername" : "Live",
"audio_driver_subname" : "",
"eventinterval" : 2,
"overdrive" : "off",
"mixerparallel" : "off",
"mixercrossfade" : 0,
"mixerlatency" : 30.0,
"mixerramptime" : 10.0
}

using max for live with ableton 9.0.5 and max 6.1.3

the problem occurs when I try to create a new leap motion Listener

even if the Listener class is empty:

-------------

import com.leapmotion.leap.Listener

public class TestListener extends Listener {

}

-----------

when I try to instance the class the results are the same, max just closes
right away with no pre-warning of any kind.

------------------------

import com.cycling74.max.DataTypes;

import com.cycling74.max.MaxObject;

import com.leapmotion.leap.Controller;

public class MaxLeapMotion extends MaxObject {

public void bang() {

outlet(0, "congradulations!");

}

public MaxLeapMotion() {

declareOutlets(new int[]{DataTypes.LIST});

TestListener listener = new TestListener(); //new SampleListener(null);

}

}
--------------------------

any ideas how to debug this issue further ?