Enable access for assistive devices?

I've been trying to set this up on the MBA 11.6, and while the checkbox is there, it just doesn't seem to work. I have this working on two different Mac Minis I have (one at work, one at home). I know this isn't a feature most people will use, but things like TextExpander requires it, and it's quite nice to have the mouse jump to the OK or Quit button.

I had my buddy try too and it did not work. Am I the only one that uses it? Has anyone else had this issue with the 2010 MBA? Strange. :\

 

Not a single person uses this? Or could even help?