Unable to select all Check Boxes from a page,giving error in web driver?

Here i'm getting all checkboxes of a page but unable to select all check boxes when i tried below code its giving error.Here is my code `public class AllCheckBoxes {
public static void main(String[] args) throws InterruptedException {

    WebDriver driver = new FirefoxDriver();

    driver.get("http://ift.tt/1QSYmgU");

    Thread.sleep(1000);
    try {
        // Option 1
        List<WebElement> CHECKBOXlist = driver.findElements(By.xpath("//input[@type='checkbox']"));

        // Option 2
        //List<WebElement> CHECKBOXlist = driver.findElements(By.cssSelector("[type='checkbox']"));

        System.out.println("Total Check Boxes are avaliable here are: "+CHECKBOXlist.size());

        for (WebElement checkbox : CHECKBOXlist) {
            checkbox.click();
        }
    } catch (Exception e) {
        System.out.println(e.getMessage());

        // Error as: Element is no longer attached to the DOM 
        // For documentation on this error, please visit: http://ift.tt/1h3Z8lU
    }

    driver.quit();
}

}` Can anybody guide me how to do this?