no video connection

[GoogleCodeExporter]

I want to use some AR.Drone Java API
I download all sources from google code 
https://code.google.com/p/javadrone/source/browse/ as .zip

and firs problem I can't compile and run ControlTower because I have missing:

package com.codeminders.ardrone.version;

import java.io.IOException;

public interface DroneVersionReader {

    String readDroneVersion() throws IOException;

}

after creating this interface I run ControlTower and Have no video connection, 
but I can control AR.Drone, and also I have Exception few times 
package 
com.codeminders.ardrone.data.decoder.ardrone10.navdata.ARDrone10NavData.java;

if(header != 0x55667788)
           throw new NavDataFormatException("Error parsing NavData");

AR.Drone 2.0
2.4.8 version.txt

Original issue reported on code.google.com by sp.titan on 19 Dec 2013 at 2:09