MouseOver commands for Webdriver...

Try with below code.

         Actions builder = new Actions(driver);
        WebElement xpathElement = driver.findElement(By.xpath("xxxxxx"));
        builder.moveToElement(xpathElement).build().perform();
        driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
        driver.findElement(By.xpath("xxxx")).click();