download popup is displaying even after setting up the pref

I am trying to download the file using below code

FirefoxProfile fp = new FirefoxProfile();
fp.setPreference("browser.download.folderList", 2);
fp.setPreference("browser.download.manager.showWhenStarting", false);
fp.setPreference("browser.download.dir", "C:\\Users\\43725587\\Desktop\\test");
fp.setPreference("browser.helperApps.neverAsk.saveToDisk", "text/csv,application/vnd.ms-excel");

FirefoxDriver driver = new FirefoxDriver(fp);
driver.get("http://qtpselenium.com/test/testdownload.php");
driver.findElement(By.xpath("html/body/a[2]")).click();

but after clicking on link still download pop up is displaying..

Pls help...