How to scroll down using Selenium WebDriver with Java
For scroll down:
WebDriver driver = new FirefoxDriver();
JavascriptExecutor jse = (JavascriptExecutor)driver;
jse.executeScript("scroll(0, 250);");
or, you can do as follows:
jse.executeScript("window.scrollBy(0,250)", "");
Try using simple java script below and you can scroll the page.
JavascriptExecutor jsx = (JavascriptExecutor)driver;
jsx.executeScript("window.scrollBy(0,450)", "");