inserting new sortable using the new ui sortables

inserting new sortable using the new ui sortables


I'm using the new sortables from the svn for a site I am developing
(the sortables are working great by the way).
But when I insert a new sortable it can't be sorted, but when I sort
another sortable the new sortable is suddenly sortable. So what would
I have to do to make the new sortable, sortable from the moment it is
inserted?
I looked in the source and there seems to be a changeSortable function
what is this function for?