Unable to find 'com/allen_sauer/gwt/dnd/gwt-dnd.gwt.xml' on your classpath

[mcativa]

I'm trying to use this nice library. Trying to add a weekpanel as
following...
<code>
VerticalPanel verticalPanel = new VerticalPanel();
decoratedTabPanel.add(verticalPanel, "New tab", false);
verticalPanel.setSize("5cm", "3cm");
{
Label label = new Label("New label");
verticalPanel.add(label);

CustomDateRenderer renderer = new CustomDateRenderer();
WeekPanel weekPanel = new WeekPanel(renderer);
verticalPanel.add(weekPanel);

}
</code>

at compile time gives me the error:
Loading module 'com.mycompany.project.Main'
Loading inherited module 'eu.future.earth.gwt.FtrGwtDate'
Loading inherited module 'com.allen_sauer.gwt.dnd.gwt-dnd'
[ERROR] Unable to find 'com/allen_sauer/gwt/dnd/gwt-
dnd.gwt.xml' on your classpath; could be a typo, or maybe you forgot
to include a classpath entry for source?
[ERROR] Line 5: Unexpected exception while processing element
'inherits'

Where is that reference? Am I missing a library?

[mcativa]

Answer to self...

I did miss some libraries, for instance:
- gwt-dnd ( http://code.google.com/p/gwt-dnd/ )
- cobogw ( http://code.google.com/p/cobogw/ )
- also be sure to update your <project>.gwt.xmk (
http://code.google.com/p/cobogw/wiki/UsingJarFile )