calling controllers with hook

[eluser]Unknown[/eluser]
Hi all,

Can I call a controller with a pre_controller hook.

Something like this, where ControllerHook is a normal controller.

Code:

$hook['pre_controller'][] = array(
  'class'    => 'ControllerHook',
  'function' => 'controllerHookFunction',
  'filename' => 'ControllerHook.php',
  'filepath' => 'hooks',
);

I tried this already, it works fine. On problem is that post hook processing I get this error

Code:

Fatal error: Call to a member function _assign_libraries() on a non-object in F:\xampp\htdocs\trunk\system\libraries\Loader.php on line 1038

I dont know what is the issue here.

Thanks in advance,
Shikhar