Making use of the bbcodeparse() function externally

[TWTCommish]

Ok, I've got a script seperate from vBulletin, and I want to be able to have certain data parsed for vB code as vB's messages are. I have a require() command pointing to the admin/functions.php file, so as to make the two functions (that I know of) available to me...

...I figured I could simply pass my text like this:

$text = bbcodeparse($text);

...but that won't work. Any idea what's up?