Problem while Calling EJB in JBoss4.0 using Eclipse3.1

Dear Friends,
I am making simple stateless bean. Which prints only Hello World. Code given in Willey's Mastering Enterprise JavaBeans
What I am doing is given below:
My Files is stored in location:
/src/examples/Hello.java
/src/examples/HelloHome.java
/src/examples/HelloBean.java
/src/examples/HelloLocal.java
/src/examples/HelloLocalHome.java

My Client file through which I am calling the Bean is stored in:
/src/examples/HelloClient.java

My JBoss and Ejb-Jar.xml files are stored in Location:
/src/META-INF/ejb-jar.xml
/src/META-INF/jboss.xml

I am using Eclipse3.1 and Jboss4.0

Codes are given below:

Hello.java

package examples;
import javax.ejb.EJBObject;
import java.rmi.RemoteException;
public interface Hello extends EJBObject
{
    public String hello() throws RemoteException;    
}

HelloHome.java

package examples;
import javax.ejb.EJBHome;
import javax.ejb.CreateException;
import java.rmi.RemoteException;

public interface HelloHome extends EJBHome
{    
      public Hello create() throws CreateException,RemoteException;
}


HelloBean.java

package examples;

import java.rmi.RemoteException;
import javax.ejb.EJBException;
import javax.ejb.SessionContext;

public class HelloBean implements javax.ejb.SessionBean
{
    private SessionContext ctx;
   
    public void ejbCreate()
    {
        System.out.println("ejbCreate");
    }
    public void ejbActivate() throws EJBException, RemoteException
    {
        System.out.println("ejbActivate");  
    }

    public void ejbPassivate() throws EJBException, RemoteException
    {
        System.out.println("ejbPassivate");
    }

    public void ejbRemove() throws EJBException, RemoteException
    {
        System.out.println("ejbRemove");        
    }

    public void setSessionContext(SessionContext ctx) throws EJBException, RemoteException
    {
        this.ctx=ctx;
    }
   
    public String hello()
    {
        System.out.println("hello()");
        return "Hello, World!";
    }        
}

HelloLocal.java

package examples;

public interface HelloLocal extends javax.ejb.EJBLocalObject
{
    public String hello();
}


HelloLocalHome.java

package examples;

public interface HelloLocalHome extends javax.ejb.EJBLocalHome
{
    HelloLocal create() throws javax.ejb.CreateException;
}


HelloClient.java

package examples;
import javax.naming.*;
import javax.rmi.PortableRemoteObject;
import java.util.Properties;
import java.util.*;


public class HelloClient
{      
      public static void main (String[] args) throws Exception
      {
            
        //Properties props= new Properties();
        
        //Properties props = System.getProperties();
      
       Hashtable env = new Hashtable();
         env.put("java.naming.factory.initial",
            "org.jnp.interfaces.NamingContextFactory");
         env.put("java.naming.factory.url.pkgs",
            "org.jboss.naming:org.jnp.interfaces");
         env.put("java.naming.provider.url",
            "localhost");       
         InitialContext context = new InitialContext(env);
      //  Context ctx = new InitialContext(env);
       // Object obj=ctx.lookup("java:comp/env/Hello");
        //HelloHome home=(HelloHome)PortableRemoteObject.narrow(obj,HelloHome.class);
       HelloHome home = (HelloHome) context.lookup("Hello");
        Hello hello=home.create();
        System.out.println(hello.hello());      
        hello.remove();
      }      
}

ejb-jar.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd">

<ejb-jar >
   <enterprise-beans>  
      <session >
         <ejb-name>Hello</ejb-name>
         <home>examples.HelloHome</home>
         <remote>examples.Hello</remote>
         <local-home>examples.HelloLocalHome</local-home>
         <local>examples.HelloLocal</local>
         <ejb-class>examples.HelloBean</ejb-class>
         <session-type>Stateless</session-type>
         <transaction-type>Container</transaction-type>
      </session>
    </enterprise-beans>  
</ejb-jar>

jboss.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE jboss PUBLIC "-//JBoss//DTD JBOSS 4.0//EN" "C:/jboss_4_0.dtd">

<jboss>

   <enterprise-beans>    
      <session>
         <ejb-name>Hello</ejb-name>
         <jndi-name>Hello</jndi-name>
         <local-jndi-name>HelloLocal</local-jndi-name>

        <method-attributes>
        </method-attributes>
      </session>
   </enterprise-beans>
   <resource-managers>
   </resource-managers>
</jboss>

After all this I am simply deploying my bean which gets deployed in Jboss.
But When I am running my client file HelloClient.java from Command Prompt  or from Eclipse I am getting the error given below

C:\jboss-4.0.0\server\default\deploy>java examples.HelloClient
Exception in thread "main" java.lang.NoClassDefFoundError: org/jboss/logging/Log
ger
        at org.jnp.interfaces.NamingContext.<clinit>(NamingContext.java:101)
        at org.jnp.interfaces.NamingContextFactory.getInitialContext(NamingConte
xtFactory.java:41)
        at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
        at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
        at javax.naming.InitialContext.init(Unknown Source)
        at javax.naming.InitialContext.<init>(Unknown Source)
        at examples.HelloClient.main(HelloClient.java:25)
can some body help me
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