GuestTrackingController init override not working

[babyewok]

I have PS 1.5.6.2 and am trying to override GuestTrackingController.php.  I have placed the following file in overrdies/controllers/front and the class_index.php cache seems ot have picked this up, but teh change is not being made!

class GuestTrackingController extends GuestTrackingControllerCore
{
public function init()
	{
		$this->display_column_left = true;
		parent::init();
		if ($this->context->customer->isLogged())
			Tools::redirect('history.php');
	}
}

I really don't get why the left column is still showing as empty when the PS cache seems to have recognised the override file!  Am I missing something?

[babyewok]

Hmm, weird - just thought I'd try something based on someone else's post and used initHeader instead of init and it seems to work now!  For future referrence, why would initHeader work and not init?  Is there any reason why I shouldn't do it this way?