Class not found

[eluser]gtipete[/eluser]
[quote author="drewbee" date="1220480177"]It looks like you have a library you want to run:

/system/application/libraries/Auth.php

Code:

Auth extends Controller
{

}

Now, in our controller:

Code:

$this->load->library('auth');

[/quote]

What i actually want to do is extend the controller. So then in my other controllers (which need authorisation) i can do

Code:

class Gallery extends MY_Auth{

    function Gallery()
    {
        parent::My_Auth();    
    }
}

Then i dont have to put the authorisation code in every controller.

Thanks