public void getBlackListedRegistration(String checkSum) {
        //TODO - AJ  <Done> getBlackListedRegistration()
        UnityIMPServer server;
        ConnectionStub connectionStub = (ConnectionStub) objConnectionStub;
        server = (UnityIMPServer) connectionStub.getServer();
        String userId = ((ConnectionStub) (this.objConnectionStub)).getLoginIdOrServerName().toString();
        String serverCheckSum = new DESEncryptor().computeCheckSum(userId);
        ResultSet rs = null;
        if (serverCheckSum.equals(checkSum)) {
            try {
                //Check sum correct
                rs = server.executeQuery("call sp_check_loginid_and_blacklist_if_checksum_valid__loginid('" + userId + "')");

                rs.next();
                if (rs.getInt(1) == 0) {
                    Logger.getLogger(ConnectedClient.class.getName()).log(Level.FINE, "\n\ndisconnect() called from getBlackListedRegistration() - Check sum correct but is already blacklisted");
                    rs.close();
                    this.objConnectionStub.disconnect();
                }
            } catch (SQLException ex) {
                Logger.getLogger(ConnectedClient.class.getName()).log(Level.SEVERE, null, ex);
            }
        } else {       //Check sum NOT correct   

            try {
                server.executeUpdate("call sp_check_loginid_and_blacklist_if_checksum_invalid__loginid('" + userId + "')");

                //disconnect
                Logger.getLogger(ConnectedClient.class.getName()).log(Level.FINE, "\n\ndisconnect" + userId + "method called from getBlackListedRegistration() - Check sum INCORRECT");
                this.objConnectionStub.disconnect();

            } catch (SQLException ex) {
                Logger.getLogger(ConnectedClient.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        checkSum = null;
        serverCheckSum = null;
        server = null;
        connectionStub = null;
        rs = null;
        userId = null;
//        throw new UnsupportedOperationException("Not yet implemented getBlackListed()");
    }