Selenium exception HTML POST

I am not able to understand y i am getting an exceptionstrong text

code

//import com.thoughtworks.selenium.DefaultSelenium;
import com.thoughtworks.selenium.webdriven.commands.*;

import org.openqa.selenium.remote.DesiredCapabilities;

import com.thoughtworks.selenium.*;
public class One {
    public static void main(String args[])
    {
        DesiredCapabilities capability = DesiredCapabilities.firefox();
        Selenium selenium = new DefaultSelenium("localhost", 4444, "*firefox", "http://www.google.com");
        selenium.start();   
        selenium.open("/");
        selenium.windowMaximize();
    }
}

Exception Exception in thread "main" java.lang.RuntimeException: Could not start Selenium session: HTTP method POST is not supported by this URL at com.thoughtworks.selenium.DefaultSelenium.start(DefaultSelenium.java:114) at One.main(One.java:13) Caused by: com.thoughtworks.selenium.SeleniumException: HTTP method POST is not supported by this URL at com.thoughtworks.selenium.HttpCommandProcessor.throwAssertionFailureExceptionOrError(HttpCommandProcessor.java:111) at com.thoughtworks.selenium.HttpCommandProcessor.getCommandResponseAsString(HttpCommandProcessor.java:185) at com.thoughtworks.selenium.HttpCommandProcessor.executeCommandOnServlet(HttpCommandProcessor.java:120) at com.thoughtworks.selenium.HttpCommandProcessor.doCommand(HttpCommandProcessor.java:100) at com.thoughtworks.selenium.HttpCommandProcessor.getString(HttpCommandProcessor.java:277) at com.thoughtworks.selenium.HttpCommandProcessor.start(HttpCommandProcessor.java:239) at com.thoughtworks.selenium.DefaultSelenium.start(DefaultSelenium.java:105) ... 1 more