Problem with getpage

<?php
$parametres = array(
    'element' => 'getResources',
    'elementClass' => 'modSnippet',
    'parents' => $modx->resource->get('id'),
    'depth' => 2,
    'limit' => 6,
    'pageVarKey' => 'page',
    'includeTVs' => 1,
    'includeContent' => 1,
    'includeTVList' => 'ma_tv,tarif,ref,tel,departement',
    'tpl' => 'article',
    'processTVs' => 1,
   'resources' => '-12,-13,-137',
  'tvFilters' =>'',
  
    'pageLastTpl' => '<li class="control"><a[[+title]] href="[[+href]]">Dernière page</a></li>',
    'pageFirstTpl' => '<li class="control"><a[[+title]] href="[[+href]]">Première page</a></li>',
);


$ref =  $_POST["reference"];

echo "la référence est".$ref;


if (!empty($_POST['reference'])){
  
    $parametres = array_merge($parametres, array(
            'tvFilters' => 'ref==FG1',
            'resources' => '-12,-13,-137',
        ));
        return $modx->runSnippet('getPage', $parametres);

  
  print_r($parametres);
  
  echo " ça marche";
}
else{

  echo " reference vide";
}