[Plugin: Visual Form Builder] Datepicker

I need to change an option datepicker. I created a javascript file with this code:
jQuery (document). ready (function ($) {
$ (“# Vfb-datereunion-22”). Datepicker ({yearRange: ‘1999: 2001 ‘});
});

This script is called from the file visualformbuilder.php in which I added a line to my script.
The script is loaded in my WordPress page, but no change on my datepicker.
Thank you for your help.

http://wordpress.org/extend/plugins/visual-form-builder/