Accessing board settings in plugin

[scarex80]

Hi guys,
I'm trying to understand the new vbulletin release and, writing a plugin, I'm facing a strange problem.

I'm trying to write a plugin with this code

$output=$vbulletin->options['bbtitle'];
vB_Template::preRegister('header',array('my_insertvar' => $output));

In order to put the board name into a personal var in header template.

But the var is empty.

I've tried several hooks (global_start was the right place for me according to old release) but with no success.

Can someone help me?

Thank you!

Regards