javac error when using jar file : cannot find symbol

I create the jar file MyJCESP.jar from MyWrapperAbstract.java &
MyWrapperData.java.
The DeriveKeyDemo.java use this jar file but compiling it result in
the "cannot find symbol" error.
Please help.

//////////////////////////////
// MyWrapperAbstract.java
//////////////////////////////

package com.mycomp.cryptox;

import com.mycomp.crypto.*;

import java.security.*;
import java.security.spec.*;
import javax.crypto.*;

public abstract class MyWrapperAbstract extends KeyGeneratorSpi {
// ...
}

//////////////////////////////
// MyWrapperData.java
//////////////////////////////

package com.mycomp.cryptox;

import com.mycomp.crypto.*;

import java.security.*;
import java.security.spec.*;
import javax.crypto.*;

abstract class MyWrapperData extends MyWrapperAbstract {
// ...
}

MyWrapperAbstract.java & MyWrapperData are compiled to create the jar
file MyJCESP.jar.

//////////////////////////////
// DeriveKeyDemo.java
//////////////////////////////
import java.io.*;
import java.util.*;
import java.security.*;
import java.security.cert.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import javax.crypto.interfaces.*;

import com.mycomp.cryptox.*; // Load MyJCEProvider classes
import com.mycomp.crypto.*; // Load MyJCAProvider classes

public class DeriveKeyDemo
{
      public static void main(String[] args)
      {
         try
         {
            keyDerivator = MyWrapperData.getInstance("DES",
"MyJCEProvider");
        keyDerivator.initialize(keyGen, 1024);

            // ...
         }
      }
}

CLASSPATH is setup as below:
$ export CLASSPATH=/home/powah/jdk1.6.0_06/jre/lib/ext/MyJCASP.jar:/
home/powah/jdk1.6.0_06/jre/lib/ext/MyJCESP.jar

$ javac DeriveKeyDemo.java
         ^
DeriveKeyDemo.java:94: cannot find symbol
symbol : method getInstance(java.lang.String,java.lang.String)
location: class com.mycomp.cryptox.MyWrapperData
            keyDerivator = MyWrapperData.getInstance("DES",
"MyJCEProvider");
                                               ^
DeriveKeyDemo.java:95: cannot find symbol
symbol : method initialize(javax.crypto.KeyGenerator,int)
location: class com.mycomp.cryptox.MyWrapperData
                keyDerivator.initialize(keyGen, 1024);
                            ^
2 errors