Package de.siemens.simaticnet.itcp.api not found in import

Hello, first of all , sorry for my english,I'll try to explain my problemas clear as I can.

I'm trying to make anApplet for a switch buttonas showed inExample6 (page 115of manual S7Beans/ Applets for IT-CPs Release 07-2005), You can also download it from
http://support.automation.siemens.com/AU/llisapi.dll?nodeid4=20229806&func=cslib.csinfo&objId=21602415&load=content&lang=en&siteid=cseus&aktprim=4&objaction=csview&extranet=standard&viewreg=AU

from theSource Code chapter.

the java source starts like this:

package de.siemens.simaticnet.itcp.telemando_marcha_bomba;
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.beans.*;
import de.siemens.simaticnet.itcp.api.*;
public class telemando_marcha_bomba extends Applet implements PropertyChangeListener, MouseListener{
private S7CP s7CP1 = null;
private S7Device s7Device1 = null;
private S7Variable s7Variable1 = null;
private Button button1 = null;

etc...

when I try tocompile it with the javac tool of Java Development Kit,
I get an error inline 6 (import de.siemens.simaticnet.itcp.api.*;)

Package de.siemens.simaticnet.itcp.api not found in import

Sincerely I don't knowexactly wich files (and in what format) I have to copy in what part of my Pcor in the java dir in order to make that beans(like S7CP, S7Device, S7Variable..)able to be imported by the java compiler tool and create my own applet.
.

Well, thanks for your attention