Template varibales Problem

[NetSlider]

Hi,
i try to create my own mod using the HOWTO in "Articles", but nothing works. The "my_test" is cached (not red in debug mode) but the variables are empty or NULL or anything else which makes Problems .

plugin1 (Hook: forumhome_start):

PHP Code:

          $templater = vB_Template::create('my_test');
          $templater->register('test1', 22);
          $templater->register('test2', 23);
          $my_template = $templater->render();
vB_Template::preRegister('FORUMHOME', array('my_test' => $my_template)); 


plugin2 (Hook: cache_template):

PHP Code:

$cache[] = 'my_test'; 


template-part: (name: my_test)

{vb:raw test1} <br>{vb:raw test2}

inserted line in FORUMHOME:

{vb:raw my_test}

Could anyone say me, where the mistake is?