Java APIs

Hello, I am implementing simple client server RMI application. But I am getting this error when I run my client,
RemoteException
java.rmi.UnmarshalException: error unmarshalling return; nested exception is:
java.lang.ClassNotFoundException: CalculatorImpl_Stub (no security manager: RMI class loader disabled)

Here is my server file, CalculatorServer.java

import java.rmi.Naming;
import java.rmi.RMISecurityManager;
import java.rmi.registry.LocateRegistry;
import java.util.Properties;

public class CalculatorServer  {

   public CalculatorServer() {
	 try {
       //Create an instance of the Server
	   Calculator c = new CalculatorImpl();
	   Properties p = System.getProperties();
	   System.setProperty("java.security.policy","C:\\Program Files\\eclipse\\security\\rmi.policy");
	   System.setProperty("java.rmi.server.codebase","file:///P:\\Projects\\RMIServer\\bin"); 
	   
	   //Register the security manager if necessary.
	   if (System.getSecurityManager() == null) {
	       System.setSecurityManager(new RMISecurityManager());
	   }	
	   System.out.println("Security manager registered");
	   
	   //Create the registry
	   LocateRegistry.createRegistry(1099);
	   System.out.println("Registry started at 1099");	   
	   
	   //Bind the server into the registry with a given name
	   Naming.rebind("rmi://localhost:1099/CalculatorService", c);
	   System.out.println("Service registered");
	   
	 } catch (Exception e) {
	   System.out.println("Trouble: " + e);
	 }
   }

   public static void main(String args[]) {
	 new CalculatorServer();
   }
}

and here is my client file, CalculatorClient.java

import java.rmi.Naming; 
import java.rmi.RemoteException; 
import java.net.MalformedURLException; 
import java.rmi.NotBoundException;
 
public class CalculatorClient { 
 
	public static void main(String[] args) { 
		try { 
		    System.out.println("Starting client");
			Calculator c = (Calculator)Naming.lookup("rmi://localhost:1099/CalculatorService");
			System.out.println("Got stub from the server");
			System.out.println( c.sub(4, 3) ); 
			System.out.println( c.add(4, 5) ); 
			System.out.println( c.mul(3, 6) ); 
			System.out.println( c.div(9, 3) ); 
		} 
		catch (MalformedURLException murle) { 
			System.out.println(); 
			System.out.println(
			  "MalformedURLException"); 
			System.out.println(murle); 
		} 
		catch (RemoteException re) { 
			System.out.println(); 
			System.out.println(
						"RemoteException"); 
			System.out.println(re); 
		} 
		catch (NotBoundException nbe) { 
			System.out.println(); 
			System.out.println(
					   "NotBoundException"); 
			System.out.println(nbe); 
		} 
		catch (
			java.lang.ArithmeticException
									  ae) { 
			System.out.println(); 
			System.out.println(
			 "java.lang.ArithmeticException"); 
			System.out.println(ae); 
		} 
	} 
} 

when I run this from the same directory I runs perfectly fine but when I have separated client & server files, it gives me this error.
I have already set codebase programatically as well as in Eclipse IDE too. But couldnt get any solution.
Can anybody please advise?
Thanks,
satya008