Exception in thread "main" org.openqa.selenium.WebDriverException: f.QueryInterface is not a function

While running java class file for selenium webdriver facing with the issue as below:

Exception in thread "main" org.openqa.selenium.WebDriverException: f.QueryInterface is not a function
Command duration or timeout: 30 milliseconds
Build info: version: '2.41.0', revision: '3192d8a', time: '2014-03-27 17:18:15'
System info: host: 'rgfr12321', ip: '104.43.244.18', os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.7.0_45'
Session ID: 7afc8ea4-c911-4da7-a435-5f34622ca096
Driver info: org.openqa.selenium.firefox.FirefoxDriver
Capabilities [{platform=XP, acceptSslCerts=true, javascriptEnabled=true, cssSelectorsEnabled=true, databaseEnabled=true, browserName=firefox, handlesAlerts=true, browserConnectionEnabled=true, webStorageEnabled=true, nativeEvents=true, rotatable=false, locationContextEnabled=true, applicationCacheEnabled=true, takesScreenshot=true, version=28.0}]
 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
 at java.lang.reflect.Constructor.newInstance(Unknown Source)
 at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:193)
 at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:145)
 at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:595)
 at org.openqa.selenium.remote.RemoteWebDriver.get(RemoteWebDriver.java:300)
 at sample.Gmail.main(Gmail.java:14)
Caused by: org.openqa.selenium.remote.ErrorHandler$UnknownServerException: f.QueryInterface is not a function
Build info: version: '2.41.0', revision: '3192d8a', time: '2014-03-27 17:18:15'
System info: host: 'rgfr12321', ip: '104.43.244.18', os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.7.0_45'
Driver info: driver.version: unknown

This can be corrected by having the pull path of the url as below


Change:
WebDriver driver = new FirefoxDriver();
driver.get("www.gmail.com");

To:
WebDriver driver = new FirefoxDriver();
driver.get("http://www.gmail.com");