BXML unknow error

[Jamal BERRICH]

Hello evry body
My bxml fil is :
<?xml version="1.0" encoding="UTF-8"?>

<nav:Navigation xmlns:bxml="http://pivot.apache.org/bxml";
xmlns:nav="ma.mizaniyate.module.setting.view.menu.ui"
xmlns:content="org.apache.pivot.wtk.content"
xmlns="org.apache.pivot.wtk">
<BoxPane orientation="vertical" styles="{fill:true}">
<Expander title="One" expanded="false">
<Label preferredWidth="100" preferredHeight="20" text="Un"
styles="{horizontalAlignment:'center', verticalAlignment:'top',
font:{italic:true}}"/>
</Expander>
<Expander title="Two" expanded="false">
<Label preferredWidth="100" preferredHeight="80" text="Deux"
styles="{horizontalAlignment:'center', verticalAlignment:'center',
font:{italic:true}}"/>
</Expander>
<Expander title="Three">
<Label preferredWidth="100" preferredHeight="50" text="Trois"
styles="{horizontalAlignment:'center', verticalAlignment:'bottom',
font:{italic:true}}"/>
</Expander>
</BoxPane>
</nav:Navigation>

for the Navigation class i have :
public class Navigation extends Component implements Bindable {

public void initialize(Map<String, Object> namespace, URL location,
Resources resources) {
System.out.println("ok");
}

}

When i execute this code :

Border border = new Border();
Border contentBorder = new Border();
Border leftBorder = new Border();
Border rightBorder = new Border();
SplitPane splitPane = new SplitPane(Orientation.HORIZONTAL);
splitPane.setSplitRatio(0.2f);
splitPane.getStyles().put("useShadow", true);
leftBorder.getStyles().put("padding", 6);
rightBorder.getStyles().put("padding", 6);
border.getStyles().put("backgroundColor", 10);
border.getStyles().put("thickness", 0);
border.getStyles().put("padding", 8);
leftBorder.setContent(navigation);
// rightBorder.setContent(component);
rightBorder.setContent(new Label("Test 2"));
splitPane.setLeft(leftBorder);
splitPane.setRight(rightBorder);
contentBorder.setContent(splitPane);
border.setContent(contentBorder);
window.setContent(border);
window.setMaximized(true);
window.open(displayHost.getDisplay());

 i have this error :
An error occurred at line number 17 in file
/D:/Cours/Projets/Mizaniyate/workspace/Dev-Mod-MizaniyateDesktopModuleSetting/bin/ma/mizaniyate/module/setting/view/menu/ui/navigation.bxml:

????