classpaths with Java Web Services,classNotFoundException

Serious problems here, I don't know what to do, been at this hours. Getting this error:

java.lang.ClassNotFoundException: User

Here's my code:

public class BookingServerPublisher{

public static void main(String[] args){

    System.out.println("Starting web Service,Press Ctrl + C to stop\n");
    // 1st argument is the publication URL
    // 2nd argument is an SIB instance
    Endpoint.publish("http://127.0.0.1:9876/bs", new BookingServerImpl());
}
}

@WebService(endpointInterface = "bs.BookingServer")

public class BookingServerImpl implements BookingServer{

User users = new User();

public void initData(){
    users.loadUsers();
}
}

@WebService
@SOAPBinding(style = Style.RPC)

public interface BookingServer{

@WebMethod void initData();

}

class BookingClient{

public static void main(String args[]) throws Exception{
    URL url = new URL("http://localhost:9876/bs?wsdl");
    // Qualified name of the service:
    // 1st arg is the service URI
    // 2nd is the service name published in the WSDL
    QName qname = new QName("http://bs/", "BookingServerImplService");
    // Create, in effect, a factory for the service.
    Service service = Service.create(url, qname);
    // Extract the endpoint interface, the service "port".
    BookingServer eif = service.getPort(BookingServer.class);

    eif.initData();
}
}

package bs;

import java.io.*;
import java.util.*;

public class User{

private static final long serialVersionUID = 1;

static ArrayList<User> userList = new ArrayList<User>();    //Dynamic List of all the User objects

String name;
String password;
String level;
boolean isAdmin = false;

User(){
    super();
}

//Method for loading User objects from data file
static void loadUsers(){
    try {
        FileInputStream stream = new FileInputStream("UsersData");
        ObjectInputStream read = new ObjectInputStream(stream);

        while(stream.available() != 0){
            Object obj = read.readObject();
             if(obj instanceof User){
                User users = (User) obj;
                userList.add(users);
            }
        }
        stream.close();
        read.close();
    }
    catch (Exception e) {
        e.printStackTrace();
    }
}

//Method for saving User objects to data file
static void saveUsers(){

    try {
        FileOutputStream stream = new FileOutputStream("UsersData");
        ObjectOutputStream write = new ObjectOutputStream(stream);

        for(int i = 0; i < userList.size();i++){
            if(userList.get(i) instanceof User){
                write.writeObject(userList.get(i));
            }
        }
        stream.close();
        write.close();
    }
    catch (Exception e) {
        e.printStackTrace();
    }
}
}

The package in all files is bs and I'm executing it as java bs.BookingServerPublisher,

java bs.BookingClient from the folder containing the bs folder,i.e. bs' parent directory, the BookingServerPublisher console throws the error.

Anyone can help me with this I really appreciate it.