Nifty Position

I want to set the position of a panel on a layer. Google dont want to help me. I tryed this:
[java]<?xml version=“1.0” encoding=“UTF-8”?>
<nifty xmlns=“http://nifty-gui.sourceforge.net/nifty-1.3.xsd” xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance” xsi:schemaLocation=“http://nifty-gui.sourceforge.net/nifty-1.3.xsd http://nifty-gui.sourceforge.net/nifty-1.3.xsd”>
<!-- +++++++++++++++++++++++++++++++++++++++ -->
<!-- start screen -->
<!-- +++++++++++++++++++++++++++++++++++++++ -->
<screen id=“start” controller=“mygame.Main”>
<layer childLayout=“center”>
<panel id=“stats” height=“120” width=“200” align=“left” valign=“top” childLayout=“center” visibleToMouse=“true”>
<interact onClick=“quit()”/>
<image filename=“Textures/nifty/Stats.png”></image>
</panel>
<panel id=“health” height=“3” width=“100” x=“19px” y=“26px” backgroundColor="#f00f"></panel>
</layer>

&lt;/screen&gt;

</nifty>
[/java]
and also this
[java]
<?xml version=“1.0” encoding=“UTF-8”?>
<nifty xmlns=“http://nifty-gui.sourceforge.net/nifty-1.3.xsd” xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance” xsi:schemaLocation=“http://nifty-gui.sourceforge.net/nifty-1.3.xsd http://nifty-gui.sourceforge.net/nifty-1.3.xsd”>
<!-- +++++++++++++++++++++++++++++++++++++++ -->
<!-- start screen -->
<!-- +++++++++++++++++++++++++++++++++++++++ -->
<screen id=“start” controller=“mygame.Main”>
<layer childLayout=“center”>
<panel id=“stats” height=“120” width=“200” align=“left” valign=“top” childLayout=“center” visibleToMouse=“true”>
<interact onClick=“quit()”/>
<image filename=“Textures/nifty/Stats.png”></image>
</panel>
<panel id=“health” height=“3” width=“100” x=“19” y=“26” backgroundColor="#f00f"></panel>
</layer>

&lt;/screen&gt;

</nifty> [java]

but both dont work!
pls help me

The nifty bible should have the info u need. Try set the parent container to have childLayout of absolute.