Listbox and textfield did not appear on the screen nifty!

I’m starting with niifty in my game but I can not bring up some objects on the screen.

In my xml has an image that sits on top of which is the logo of the game, and it appears fine, but below, in panelControl, only the text “HelloWorld” appears , the listbox and textfield did not appear on the screen.

I’m using jme3 with sdk alpha 4.

nifty xml:

[xml]<?xml version=“1.0” encoding=“UTF-8”?>

<nifty>

<screen id=“telainicio” controller=“com.gensystems.decor.controller.TelaInicioController”>

<layer id=“layer” backgroundColor="#00000050" childLayout=“vertical”>

<panel id=“panelTitulo” height=“20%” width=“100%” backgroundColor="#ffffff" childLayout=“center” visibleToMouse=“true”>

<effect>

<onStartScreen name=“move” mode=“in” direction=“top” length=“300” startDelay=“0” inherit=“true”/>

<onEndScreen name=“move” mode=“out” direction=“bottom” length=“300” startDelay=“0” inherit=“true”/>

<onHover name=“pulsate” scaleFactor=“0.008” startColor="#f600" endColor="#ffff" post=“true”/>

</effect>

<image align=“center” valign=“center” filename=“Imagens/logo.png” />

</panel>

<panel id=“panelControl” height="*" width=“100%” backgroundColor="#ffffff" childLayout=“center” visibleToMouse=“true”>

<effect>

<onStartScreen name=“move” mode=“in” direction=“top” length=“300” startDelay=“0” inherit=“true”/>

<onEndScreen name=“move” mode=“out” direction=“bottom” length=“300” startDelay=“0” inherit=“true”/>

<onHover name=“pulsate” scaleFactor=“0.008” startColor="#f600" endColor="#ffff" post=“true”/>

</effect>

<text id=“text” font=“Interface/Fonts/Arial.fnt” color="#000f" text=“Hello World!” />

<control id=“listBox1” name=“listBox” horizontal=“false” width=“50%” height=“30%” childLayout=“vertical” visibleToMouse=“true” displayItems=“10” forceSelection=“true”>

<panel id=“listBox1Data” width=“100%” childLayout=“vertical” visibleToMouse=“true”>

</panel>

</control>

<panel childLayout=“horizontal”>

<label text="Test Field: " width=“100px” align=“left” textVAlign=“center” textHAlign=“left”/>

<control id=“field” name=“textfield” text=“test”/>

</panel>

</panel>

</layer>

</screen>

</nifty>[/xml]

Can someone tell me what I am doing wrong?