IE8 is not work in selenium webdriver

This is not work for me In IE8 browser. I enable and disable "Enable Protected Mode" then try but I am still getting error in the eclipse


public class pdfconvoter
{
    public static void main(String[] args)
    {



    System.setProperty("webdriver.ie.driver","C:\\Users\\Downloads\\IEDriverServer.exe");
             WebDriver driver = new InternetExplorerDriver();
             driver.get("https://login.salesforce.com/?locale=uk");
              driver.findElement(By.id("username")).sendKeys("username");

              driver.findElement(By.id("password")).sendKeys("password");
              driver.findElement(By.id("Login")).click();


        }
}

**Error:**

    Started InternetExplorerDriver server (32-bit)
    2.25.3.0
    Listening on port 45452
    Exception in thread "main" org.openqa.selenium.WebDriverException: Unexpected error     launching Internet Explorer. Protected Mode settings are not the same for all zones. Enable Protected Mode must be set to the same value (enabled or disabled) for all zones. (WARNING: The server did not provide any stacktrace information)
    Command duration or timeout: 1.17 seconds
    Build info: version: '2.25.0', revision: '17482', time: '2012-07-18 21:09:54'
    System info: os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.7.0_09'
    Driver info: driver.version: InternetExplorerDriver
    Session ID: b17075fe-19f7-4f50-b1ce-9b84667ba409
    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:188)
    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:145)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:498)
    at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:182)
    at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:167)
    at org.openqa.selenium.ie.InternetExplorerDriver.startSession(InternetExplorerDriver.java:133)
    at org.openqa.selenium.ie.InternetExplorerDriver.setup(InternetExplorerDriver.java:106)
    at org.openqa.selenium.ie.InternetExplorerDriver.<init>(InternetExplorerDriver.java:52)
    at pdfconvoter.main(pdfconvoter.java:25)