[Moo] Why cloneEvents() doesn't work here?

[Lorenzo De Tomasi]

Ciao,
I'm developing a simple ecommerce cms for indipendent musicians,
released under a GPLv3 license.
I'm working on the cart <http://www.jsfiddle.net/jR3w8/12/>
Why when I clone a <tr> fron the order table to the cart table, the
event .addEvent('change',function() {  totalUpdate(this); }) is not
cloned/doesn't work?

Thank you very much.