Can you post your routes.php file and your associated controller code?

of course,

Here the routes.php

<?php

/*
|--------------------------------------------------------------------------
| Application Routes
|--------------------------------------------------------------------------
|
| Here is where you can register all of the routes for an application.
| It's a breeze. Simply tell Laravel the URIs it should respond to
| and give it the Closure to execute when that URI is requested.
|
*/

Route::get('/', function(){
    return "All cats";
});

Route::get('cats/{id}', function($id){
     return "Cat #$id";
});

and here is the controller :

class HomeController extends BaseController {

	/*
	|--------------------------------------------------------------------------
	| Default Home Controller
	|--------------------------------------------------------------------------
	|
	| You may wish to use controllers instead of, or in addition to, Closure
	| based routes. That's great! Here is an example controller method to
	| get you started. To route to this controller, just add the route:
	|
	|	Route::get('/', 'HomeController@showWelcome');
	|
	*/

	public function showWelcome()
	{
		return View::make('hello');
	}

}

I hope I have the right controller. The books is not talking about controllers yet.

Roelof

Try calling

<rooturl>/cats/123

The requested URL /cats/123 was not found on this server.