Валидацию прошел, но почему то не могу подключиться к серверу

package com.javarush.task.task30.task3008.client;

public class ClientGuiController extends Client {
    private ClientGuiModel model = new ClientGuiModel();
    private ClientGuiView view = new ClientGuiView(this);

    public class GuiSocketThread extends SocketThread {
        @Override
        protected void processIncomingMessage(String message) {
            model.setNewMessage(message);
            view.refreshMessages();
        }

        @Override
        protected void informAboutAddingNewUser(String userName) {
            model.addUser(userName);
            view.refreshUsers();
        }

        @Override
        protected void informAboutDeletingNewUser(String userName) {
            model.deleteUser(userName);
            view.refreshUsers();
        }

        @Override
        protected void notifyConnectionStatusChanged(boolean clientConnected) {
            view.notifyConnectionStatusChanged(clientConnected);
        }
    }

    @Override
    protected SocketThread getSocketThread() {
        return new GuiSocketThread();
    }

    @Override
    public void run() {
        SocketThread socketThread = getSocketThread();
        socketThread.run();
    }

    @Override
    protected String getServerAddress() {
        return view.getServerAddress();
    }

    @Override
    protected int getServerPort() {
        return view.getServerPort();
    }

    @Override
    protected String getUserName() {
        return view.getUserName();
    }

    public ClientGuiModel getModel() {
        return model;
    }

    public static void main(String[] args) {
        ClientGuiController clientGuiController = new ClientGuiController();
        clientGuiController.run();
    }

}

public void notifyConnectionStatusChanged(boolean clientConnected) {
    textField.setEditable(clientConnected);
    if (clientConnected) {
        JOptionPane.showMessageDialog(
            frame,
            "Соединение с сервером установлено",
            Чат",
            JOptionPane.INFORMATION_MESSAGE);
    } else {
        JOptionPane.showMessageDialog(
            frame,
            "Клиент не подключен к серверу",
            "Чат",
            JOptionPane.ERROR_MESSAGE);
    }
}

protected void clientHandshake() throws IOException, ClassNotFoundException {
            while (!clientConnected) {
                Message message = connection.receive();
                if (message.getType() == MessageType.NAME_REQUEST) {
                    Message userName = new Message(MessageType.USER_NAME, getUserName());
                    connection.send(userName);
                } else if (message.getType() == MessageType.NAME_ACCEPTED) {
                    notifyConnectionStatusChanged(true);
                } else {
                    throw new IOException("Unexpected MessageType");
                }
            }
        }

protected void clientHandshake() throws IOException, ClassNotFoundException {
            while (true) {
                Message message = connection.receive();
                MessageType type = message.getType();

                if (type == MessageType.NAME_REQUEST) {
                    connection.send(new Message(MessageType.USER_NAME, getUserName()));
                } else if (type == MessageType.NAME_ACCEPTED) {
                    notifyConnectionStatusChanged(true);
                    return;

                } else {
                    throw new IOException("Unexpected MessageType");
                }
            }
        }

return;