Auto-Generated Pages on WebSignup Not Working with Case-Sensitive...

<?php
if($mode=="new"){   
    $wuid = $username;
    $table_name = $modx->getFullTableName( 'site_content' );
    $fields = array(
                        'type'  =>  'document',
            'contentType'   => 'text/html',
            'pagetitle' => $wuid,
            'alias'     => $wuid,
            'published' => '1', //is the page published?
            'parent'    => '16', //what is the parent of this new page?
            'isfolder'  => '0', // lets make this a folder
            'template'  => '15', //type template id here
            'cacheable' => '0',
            'createdby' => $wuid,
            'createdon' => time(),
            'editedon'  => time(),
            'publishedon'   => time(),
            'hidemenu'  => '1'
            );

    $modx->db->insert( $fields, $table_name); // put the fields in the db (id wil be created incremental.)
 
//Create  placeholder and put the id in a session to use for mail or whatever.
$_SESSION['eigenpaginaid'] =  $modx->db->getInsertId();
$modx->setPlaceholder('eigenpaginaid', $modx->db->getInsertId());
 
   return;
}

'pagetitle' => strtolower($wuid),
'alias'     => strtolower($wuid)