Individual column filter using "select" not working

Hi Guys,

I've been trying to use the individual column filters like on this example

http://www.datatables.net/release-datatables/examples/api/multi_filter_select.html

But I can't get it to work for some reason. I'm using jquery 1.9 and datatables 1.9, but I keep getting an error on the console on the first line of the example

(function($) {

The error I get in the console is "Uncaught TypeError: object is not a function".

Any ideas would be great!

Thanks
Fede