URI Routing for URLs with dashes (-)

[eluser]ehicks727[/eluser]
Ok, I'm retarded. In the Controllers guide, I read that this default constructor works in PHP5, so I used it.

Code:

function __construct() {
        parent::Controller();    
    }

Then I noticed that routing stopped working completely. So I changed my default constructor to this again

Code:

function Business_directory() {
        parent::Controller();    
    }

and now everything works great. Why does this

Code:

__construct()

break routing??