I'm not a coder, but I guess the problem is in class_dm_user.php.
This hack adds 5 fields to the database table user, but the script doesn't know what to do with those when a new user is added.
Here's a fix (WAIT for a real coder to really fix it)
Open includes/class_dm_user.php and find (located at top of file in
Code:
var $validfields = array(
)
Code:
'pmunread' => array(TYPE_UINT, REQ_NO),
Add below that
Code:
'warnings' => array(TYPE_INT, REQ_NO),
'warning_level' => array(TYPE_INT, REQ_NO),
'warning_bans' => array(TYPE_INT, REQ_NO),
'alerts' => array(TYPE_INT, REQ_NO),
'warn_notes' => array(TYPE_UINT, REQ_NO),
This allows to add users.