stuck at creating table

[miduku]

I am new in extra developement for ModX so please bare with me :)
I am at the point where you create the include snippet in modx with the extra lines of code before the return statement:

<?php
$o = include $file;

$m = $modx->getManager();
$created = $m->createObjectContainer('Doodle');
return $created ? 'Table created.' : 'Table not created.';

return $o;

But when I run the resource document in the browser it says "Table not created."

I'm running this on localhost with xampp.
ModX is installed in /www/modx2
and doodles in the seperated folder /www/doodles

.htaccess RewriteBase is /www/modx2

added System Settings:
doodles.core_path to /www/doodles/core/components/doodles/
and
doodles.assets_url to /doodles/assets/components/doodles/

I noticed that the code in github is slightly different from the ones in the tutorial.
Example: I had to change the MODX_BASE_PATH in "build.config.php".
So I Added

define('MODX_BASE_PATH', dirname(dirname(dirname(dirname(__FILE__)))) . '/www/modx2/');

to make it work in the local environment. this wasn't in the tutorial :(

Is there something else I am missing to make it work on a local mashine?