dragAndDrop is not releasing the item

Hello All,

I have a scenario wherein i have to drag & drop an item to other place in a webpage, i am able to drag to the desired offset, but the problem is that WebDriver is not releasing the item, it keeps holding which resulting where ever i move my mouse pointer item gets dragged to that position.

WebElement dragObject = driver.findElement(By.xpath("//*[@id='1009_header_hd']"));
Actions act = new Actions(driver);
act.dragAndDropBy(dragObject, 300, 20).build().perform();

Thanks in advance.