Hooks Not Work

[kudretakifoglu]

Hi all

i have a small problem about using hooks.

My hooks.php is

 

if (!defined("WHMCS"))
die("This file cannot be accessed directly");
function logout($vars) {
echo "bye byeee";
}
add_hook("AdminLogout",1,"logout");

 

in /includes/hooks

 

When i logout with my admin account any thing happens.How can i use it straight.Thanks for helps and ideas