[ajax] dragging stops after adding item

so basically i’m just trying to add an item to a list of other drag-able items taken from a mysql database. i got the list to output and i also got it to update (without totally reloading the page) once a new item has been added. the problem is when i do add a new item, the dragging no longer works.

you can view the main source here:

any ideas or help on why this is happening would be greatly appreciated!