Can't Get an External Page to Work with Data Manager

[ShannonA]

I've been trying to create an external page that accesses vBulletin to add (or later, subtract) a user to a secondary usergroup. It sounds like it should be an easy enough task using the datamanager, though I've never used the datamanager before.

Unfortunately, when I try to do this, the web page dies out sometime during its look at "includes/init.php". I can't find any errors in the WWW error files, nor does anything show up on screen.

<?

  $forumFile = "/defined/here";
   addUserToGroup(981,0);
  
function addUserToGroup($userid,$groupid) {

  global $forumFile;

  define('VB_AREA', 'External');
  define('SKIP_SESSIONCREATE',1);
  define('SKIP_USERINFO',1);
  define('THIS_SCRIPT', __FILE__);

  define('CWD',$forumFile);

// I've verified that $forumFile is set correctly here

echo "A";

  require_once(CWD . '/includes/init.php');

echo "B";

    $userinfo = fetch_userinfo($userid);
    $membergroups = fetch_membergroupids_array($userinfo);

#     $userdm =& datamanager_init('User', $vbulletin, ERRTYPE_STANDARD);
  
  } 

?>

I see the "A", but not the "B". Any ideas?

vB 4.2.2