[fw-mvc] Dojo grid problem

hi to all

have tried to use dojo data with dojox grid but don't work.the output are
only 2 checkbox without label.have take part of code from
here:http://www.zend.com/topics/Zend-Framework-Dojo-webinar.pdf

this i s my own code:
view script:

<table jsId="grid" dojoType="dojox.grid.Grid" store="activeStore" query="{
id:'*'}">
<tr><th field="id"><th field="categoria"></tr>
</table>
dojo data action:
lic function activeAction(){

$model=new RegistroFile();
$dojoData= new Zend_Dojo_Data('id',$model->fetchAll(),'id');

$this->view->data=$dojoData;


}
on dojo data view script have used the "toJson" method on output.on
bootstrap have used this code:
$view=$layout->getView();

Zend_Dojo::enableView($view);

$view->dojo()->setLocalPath('/js/dojo/dojo.js')

->addStylesheetModule('dijit.themes.soria')

->requireModule('dojo.data.ItemFileReadStore')

->requireModule('dojox.grid.Grid')

->disable();
what is the problem?
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