Help with Toolbox for Java on the iSeries

I looked through the archives but couldn't find what I needed, so...

I'm trying to move some Java classes that use Toolbox for Java to the iSeries.

I put a Java class file called ExtolCl in /QIBM/ProdData/Java400/ where the 
delivered Hello.class file is located and where the jt400ntv.jar file is 
located.

I enter java Hello and the delivered Hello program runs fine. I enter java 
ExtolCl and I get this error:

java.lang.NoClassDefFoundError: com/ibm/as400/access/AS400                   
        at java.lang.Throwable.<init>(Throwable.java:195)                    
        at java.lang.Error.<init>(Error.java:49)                             
        at java.lang.NoClassDefFoundError.<init>(NoClassDefFoundError.java:40
)                                                                            
        at ExtolCl.callProgram(ExtolCl.java:17)                              
        at ExtolCl.main(ExtolCl.java:37)                                     
Java program completed with exit code 1                                      

What do I need to change in order to get the Toolbox for Java classes to be 
picked up? Here's the entire program code:

import com.ibm.as400.access.*; 

public class ExtolCl {
 public String errorParm = "";

 public void callProgram() {
  try {
    AS400 system = new AS400("mysystem", "myname", "mypassword");
    ProgramCall pgm = new ProgramCall(system);
    String program = "/QSYS.LIB/EXTOL.LIB/EXTOLCL.PGM";
    ProgramParameter[] parameterList = new ProgramParameter[1];       
    parameterList[0] = new ProgramParameter(1);
    pgm.setProgram(program, parameterList);
    if (pgm.run() != true) {
      errorParm = "1";
    } else {
      AS400Text errorValue = new AS400Text(1);
      errorParm = 
(errorValue.toObject(parameterList[0].getOutputData())).toString();
    }//end-if                   
    system.disconnectAllServices();
  } catch (Exception e) {
    errorParm = "1";
  }//end-try-catch
 }//end-callProgram

 public static void main(String[] args){
  ExtolCl test = new ExtolCl();
  test.callProgram();   
 }//end-Main

}//end-ExtolCl


Thanks,
Kelly

A cop stopped me for speeding. He said, "Why were you going so fast?" I said, 
"See this thing my foot is on? It's called an accelerator. When you push down 
on it, it sends more gas to the engine. The whole car just takes right off. And 
see this thing? This steers it." -- Steven Wright