drag and drop clone issue in 1.7

drag and drop clone issue in 1.7


i am not much experienced in UI but have worked with its few widgets .
i am using drag and drop approach.
i have lists of products and want to drop that products in the box.
it works fine as i got the demo from http://jqueryui.com/demos/droppable/#photo-manager.
The Problem is that , when i drag and product image in the box it
disappears from its location and drop in the box.
i want my product that i drag should be there and a clone of product
image should be in the box.
Plz help me , i have been mad in that working ...