DashBoard widget browser is not loading data from db

I am trying to create a dashboard for my proyect, with the dashboard add-on, and everything was working ok until I decide to include a list from an entity. The thing is the windget is loading, but data doesn’t appears. I already chekc the query and this one is fine. I think I am using last version of the addon, but I am sure I have previous version of CUBA.

This is my XML:

    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
<fragment xmlns="http://schemas.haulmont.com/cuba/screen/fragment.xsd">
    <data readOnly="true">
        <collection id="oTAvisosDc"
            <loader id="oTAvisosDl">
                    <![CDATA[select e from pg_OTAviso e]]>
    <layout expand="oTAvisosTable"
        <table id="oTAvisosTable"
                <column id="dtype" caption="Tipo"/>
                <column id="estado" caption="Estado"/>

There is any limitation with screen-fragments that avoid correct work with this?, because I am not getting errors. I am also checking in the controler with:

public void onInit(InitEvent event) {
    System.out.println("Is loaded");

But I am not getting response neither. I also try with dl.load(), and nothing.

I open to other ways of getting this list updated.