Java HotSpot Virtual Machine

I am trying to run a simple JNI example code from Deitel book.

// JNIPrintMain.java
// Loads the native library, creates a new instance of the
// Java wrapper class, and calls the native methods.

public class JNIPrintMain{

// uses JNI to print a message
public static void main( String args[] )
{
JNIPrintWrapper wrapper = new JNIPrintWrapper();

// call to native methods through JNIWrapper
wrapper.printMessage( "Hello World\n" );
}
}

// JNIPrintWrapper.java
// Allows access to native methods

public class JNIPrintWrapper {

// load library JNIPrintMessage into JVM
static {
System.loadLibrary( "JNIPrintMessage" );
}

// native C++ method
public native void printMessage( String message );

}

// JNIPrintWrapperImpl.cpp
// Implements the header created by java
// to integrate with JNI.

// C++ core header
#include <iostream.h>

// header produced by javah
#include "JNIPrintWrapper.h"

// prints the string given from java
JNIEXPORT void JNICALL Java_JNIPrintWrapper_printMessage
( JNIEnv * env, jobject thisObject, jstring message )
{
// boolean to determine if string is copied
jboolean copied;

// call JNI method to convert jstring to cstring
const char* charMessage =
env->GetStringUTFChars( message, &copied );

// print the message
cout << charMessage;

// release the string to prevent memory leak
env->ReleaseStringUTFChars( message, charMessage );
}

#include <jni.h>
/* Header for class JNIPrintWrapper */

#ifndef IncludedJNIPrintWrapper
#define IncludedJNIPrintWrapper
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: JNIPrintWrapper
* Method: printMessage
* Signature: (Ljava/lang/String;)V
*/
JNIEXPORT void JNICALL Java_JNIPrintWrapper_printMessage
(JNIEnv *, jobject, jstring);

#ifdef __cplusplus
}
#endif
#endif


I put in VM parameters -Djava.library.path=<%library path where dll is exist%>
I did all the instructions which are written in the book, but I get an exception
java.lang.UnsatisfiedLinkError: printMessage

at jnisample.JNIPrintWrapper.printMessage(Native Method)

at jnisample.JNIPrintMain.main(JNIPrintMain.java:11)

Exception in thread "main"

What can I do to solve this problem?

Thanks.