Getting tablesorter to sort by date?

Getting tablesorter to sort by date?

Hi,
I am trying to get the table sorter to sort by date, but it is not working. I have applied a custom parser but jquery does not seem to be picking it up.

I'm sure this is something simple, can anybody see whats wrong?

Here is my page, the table heading is the "expiry"

http://bit.ly/bUIJpC