Sortable.create

Hi,

I developed same feature using the Demo Application and working great
for me too

http://webdesign.torn.be/tutorials/javascript/prototype/sort-images-with-prototype/demo/

but when i add a option called ghosting: true in
Sortable.create('sortlist', { tag: 'img', overlap:'horizontal',
constraint:false, ghosting:true,

the sorting is not smooth and the images are not adjusting /moving as i
drag the image on other like previous .

How can we achieve the same functionality by using ghosting: true and
moving of images while dragging ...

Thanks in advance ..
Sri..