$routeParams is undefined

I´m pretty noob in angular JS and I´m facing problem. the instruccion console.log($routeParams) show me a routeParams empty and I don´t know why. I created my proyect using the ionic yeoman generator.

this is inside my view (generates urls like this http://localhost:8100/#/app/tracking/50)

 <p ng-repeat="item in items">
   <a href="#/app/tracking/{{item .number}}" class="item item-icon-left">
     <i class="icon ion-home"></i>
      {{item .a}} - {{item .b}}
   </a>
 </p>

my router configuration in app.js

.state('app.tracking', {
    url: "/tracking/:idItem",
data: {
    requireLogin: true
  },
views: {
  'menuContent': {
    templateUrl: "templates/tracking.html",
    controller: 'TrackingCtrl'
  }
}
})

This is my controller (I tried to acces in those ways)

.controller('TrackingCtrl', function($scope,$routeParams) {

  console.log($routeParams);
  console.log($routeParams.idItem);
  console.log($routeParams["idItem"]);

})

I have ngRoute defined here int app.js

   angular.module('starter', ['ionic','angular-  md5','ngCordova','starter.controllers','ngRoute'])

And finally the reference to the bower component is the index

 <script src="bower_components/angular-route/angular-route.js"></script>

Thanks in advance for your time