Problem with vbulletin phrases

[Scanu]

Hi i don't know why but i can't get working a custom phrase in my plugin, i do this many times but now it doesn't work :S First of all i add a new phrase

Phrase Type: GLOBAL

Product: My product

Varname: message_test

Text: Test test test test test...

and then in the plugin i put this

Hook Location: global_bootstrap_init_complete

Plugin PHP Code: $template_hook['headinclude_javascript'] .= $vbphrase['message_scanu'];

But nothing :S Hope that someone can helps me