[jQuery] nested Sortable Bug

[pedramphp]

Dear sir ,
I'm working with nested sortable Plugin 
http://plugins.jquery.com/project/NestedSortable
the ploblem is this plugin only works with jQuery 1.1.3 and if I
change the jQuery source file to 1.2.3 it only Drags the Items
Once ....
this Ploblem Accured in IE7 , I need this plugin badly in my projecty
what is the solution has anyone worked with this Before !!!