is_member_of gives mixed results?

[Kyojii]

Here's an easier example of my problem.

PHP Code:

<?php
require_once("./global.php");
echo is_member_of($vbulletin->userinfo, 6);
?>

Result: 1 (true)

PHP Code:

<?php
require_once('./global.php');

function allowaccess() {
if (is_member_of($vbulletin->userinfo, 6)){
    return 1;
}
else{
    return 0;
}
}
echo allowaccess();
?>

Result: 0 (false)

--------------- Added [DATE]1293142374[/DATE] at [TIME]1293142374[/TIME] ---------------

I got around this by instead of making my own function just making an array of users I wanted to be able to access the page and including the file on every page.