Zend Framework - 404使用AJAX访问控制器中的操作时

in a view i'm trying to modify the content of a window with ajax

$.updateWindowContentWithAjax("gendocumento","<?php echo $this->url(array('module' => 'contratistas','controller'=>'Personal','action'=>'generarDocumento' ,'id'=> $this->personal['id']),NULL,true)?>");

the 'generarDocumento' action should print the id in the terminal with the 'error_log()' method

public function generarDocumentoAction(){
    $this->_helper->layout->disableLayout();
    $this->_helper->viewRenderer->setNoRender();

    error_log($this->_getParam('id'));

}

but it doesn't do anything and in the terminal i get

[404]: /contratistas/Personal/generarDocumento/id/177