I am new to codeigniter and cannot get my ajax to work.

I am trying to make links load content into the main document on click.

I looked for instructions but could not figure it out. All works except the ajax returns alert('ERROR') message. nothing is loadded into <div id='load_here'></div>

Maybe I am missing something in config.php? Do i have to load some library for this to work?
Any ideas would be helpfull
//main document link

<span id='reg_link_rules'>Link</span>  

<div id='load_here'></div>

// controller

class Register extends CI_Controller {

   public function hello()

   {

      echo 'hello';

   }

}

// jQuery

$(document).ready(function() {

    $('#reg_link_rules').click(function(eve){



    $.ajax({

      type: GET, 

      url: register/hello, 



      complete: function(data){

        $('#load_here').html(data);

    },

    error: function(){alert('error');}

    });

  });

});

I think the problem is that the ajax url does not access the controller.
Z:/home/codeigniter/www/register/test this is where i think it takes me

problem solved, the url needed to be http://codeigniter/index.php/register/hello