My grid/node version question

error_msg_without_version_via_grid.log

Exception in thread "main" org.openqa.selenium.WebDriverException: 
System info: os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.6.6', java.version: '1.6.0_26'
Driver info: driver.version: RemoteWebDriver
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:131)
	at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:105)
	at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:409)
	at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:103)
	at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:86)
	at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:94)
	at com.yahoo.media.mediaqa.CannCastTest.CannCastTest.main(CannCastTest.java:30)

globalmedia_yselenium_rc_config.json

{
  "capabilities":
      [
        {
          "browserName": "firefox",
          "platform": "WINDOWS",
          "firefox_binary": "C:\\Program Files\\Mozilla Firefox\\firefox.exe",
          "seleniumProtocol": "Selenium",
          "maxInstances": 6
        },
        {
          "browserName": "firefox",
          "platform": "WINDOWS",
          "version": "3.6",
          "firefox_binary": "C:\\Program Files\\Mozilla Firefox\\firefox.exe",
          "seleniumProtocol": "WebDriver",
          "maxInstances": 6
        },
        {
          "browserName": "firefox",
          "platform": "WINDOWS",
          "version": "4.0",
          "firefox_binary": "C:\\Program Files\\Mozilla Firefox 4\\firefox.exe",
          "seleniumProtocol": "WebDriver",
          "maxInstances": 6
        },
        {
          "browserName": "firefox",
          "platform": "WINDOWS",
          "version": "5.0",
          "firefox_binary": "C:\\Program Files\\Mozilla Firefox 5\\firefox.exe",
          "seleniumProtocol": "WebDriver",
          "maxInstances": 6
        },
        {
          "browserName": "firefox",
          "platform": "WINDOWS",
          "version": "6.0",
          "firefox_binary": "C:\\Program Files\\Mozilla Firefox 6\\firefox.exe",
          "seleniumProtocol": "WebDriver",
          "maxInstances": 6
        },
        {
          "browserName": "firefox",
          "platform": "WINDOWS",
          "version": "7.0",
          "firefox_binary": "C:\\Program Files\\Mozilla Firefox 7\\firefox.exe",
          "seleniumProtocol": "WebDriver",
          "maxInstances": 6
        },
        {
          "browserName": "firefox",
          "platform": "WINDOWS",
          "version": "8.0",
          "firefox_binary": "C:\\Program Files\\Mozilla Firefox 8\\firefox.exe",
          "seleniumProtocol": "WebDriver",
          "maxInstances": 6
        },
        {
          "browserName": "chrome",
          "platform": "WINDOWS",
          "seleniumProtocol": "WebDriver",
          "maxInstances": 6
        },
        {
          "browserName": "internet explorer",
          "platform": "WINDOWS",
          "seleniumProtocol": "WebDriver",
          "maxInstances": 1
        }        
      ],
  "configuration":
  {
    "maxSession": 6,
    "port": 5555,
    "register": true,
    "registerCycle": 5000
  }
}

node command

java -jar selenium-server-standalone.jar -role node -hub http://selgrid2.blah.blah.com:80 -nodeConfig globalmedia_yselenium_rc_config.json  1>>"C:\shared\logon-script\Selenium2RC.log" 2>&1

selenium2test.java

package com.yahoo.media.mediaqa.selenium2test;

import java.net.MalformedURLException;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
import java.net.URL;

public class selenium2test {

	public static void main(String[] args) {
		
		DesiredCapabilities capability = DesiredCapabilities.firefox();
		capability.setVersion("3.6");  
				
			try {
			WebDriver driver = new RemoteWebDriver(new URL("http://selgrid2.blah.blah.com:80/wd/hub"), capability);

			String baseUrl = "http://google.com";
			
			driver.get(baseUrl);
			System.out.println(driver.getTitle());
			
			
			} catch (MalformedURLException e) {
				   // TODO Auto-generated catch block
			}
	}

}