.Draggable work only once under IE 6/7/8

.Draggable work only once under IE 6/7/8

Hi! I'm trying to create custom scroll box, but under IE, the drag-drop event commit once. Under Mozila, Safari, Chrome and Opera it works fine but in IE...
You can see my code on:

http://www.memo.bg/ntest/

I'm realy stuck.
Please help.