So, you've been using it fine with your 2005? Do you have the 6 disc deck?
Their website clearly states it is not compatible both with 2005-2007 Focus nor with the 6 disc decks..
I really need to hook up the AUX.. I've got a Pioneer deck to put in, but I love the steering wheel audio controls too much to lose them.
edit: it's pretty obvious you do indeed have both by the pics. Duh. I'm gunna have to find one.