[cellarius]

Why at all do you use the preregister method? The (correct) method in the tutorial is different and does not use preregister:

PHP Code:

$templater = vB_Template::create('TEST');
$templater->register_page_templates();
$templater->register('navbar', $navbar);
$templater->register('pagetitle', $pagetitle);
print_output($templater->render()); 


For your variable you would have to add a line like this:

PHP Code:

$templater->register('includephp', $includephp); 


Concerning your test with

PHP Code:

<?php Print "Hello, World!"; ?>

It looks to me that you use <?php ?> while not needing to - it's already around the complete page, so if you put your code somewhere in the middle, you don't need it once again. But this is plain guesswork without seeing your code. The base line is that the tutorial works perfectly well if followed correctly, so there need to be errors in your code. It would be helpful if you would paste the whole thing, with those little tidbids it's really hard to tell.