datahandler_post_validate_thread hook not working!

[marcus123]

I have a hook to:


$plugins->add_hook("datahandler_post_validate_thread", "test");

Want function only affect new threads but nothing is happening???

$post->data['subject']
$post->data['message']

function allowed_charecters(&$post)
{
global $mybb;
if($post->data['subject'] > $test)
{
echo "works";

}