Java Programming

Hi everyone, i want to run this ID3 Test

//package id3test;

import java.io.*;
import org.blinkenlights.jid3.*;
import org.blinkenlights.jid3.v1.*;
import org.blinkenlights.jid3.v2.*;

public class ID3Test
{
    private static void main(String[] args)
        throws Exception
    {
        // the file we are going to modify
        File oSourceFile = new File("some_file.mp3");

        // create an MP3File object representing our chosen file
        MediaFile oMediaFile = new MP3File(oSourceFile);

        // create a v1.0 tag object, and set some values
        ID3V1_0Tag oID3V1_0Tag = new ID3V1_0Tag();
        oID3V1_0Tag.setAlbum("Album");
        oID3V1_0Tag.setArtist("Artist");
        oID3V1_0Tag.setComment("Comment");
        oID3V1_0Tag.setGenre(ID3V1Tag.Genre.Blues);
        oID3V1_0Tag.setTitle("Title");
        oID3V1_0Tag.setYear("1999");
       
        // set this v1.0 tag in the media file object
        oMediaFile.setID3Tag(oID3V1_0Tag);
       
        // create a v2.3.0 tag object, and set some frames
        ID3V2_3_0Tag oID3V2_3_0Tag = new ID3V2_3_0Tag();
        TPE1TextInformationID3V2Frame oTPE1 = new TPE1TextInformationID3V2Frame("Lead Performer");
        oID3V2_3_0Tag.setTPE1TextInformationFrame(oTPE1);
        TRCKTextInformationID3V2Frame oTRCK = new TRCKTextInformationID3V2Frame(3, 9);
        oID3V2_3_0Tag.setTRCKTextInformationFrame(oTRCK);
        TIT2TextInformationID3V2Frame oTIT2 = new TIT2TextInformationID3V2Frame("Song Title");
        oID3V2_3_0Tag.setTIT2TextInformationFrame(oTIT2);
       
        // set this v2.3.0 tag in the media file object
        oMediaFile.setID3Tag(oID3V2_3_0Tag);
       
        // update the actual file to reflect the current state of our object 
        oMediaFile.sync();
    }
}

and although i have added the ID3 required Library and JUnit it still (netbeans 6.1 RC2) shows that

import org.blinkenlights.jid3.*;
import org.blinkenlights.jid3.v1.*;
import org.blinkenlights.jid3.v2.*;

packages dont exist. Maybe i'm doing s/thing wrong when adding the library.
I obtained the library from here http://jid3.blinkenlights.org/
Any advice? Thank you for your time.