Drag operation does not work

SmartGWT pro version 4.1.d
Firefox 25.0.1

Click handler fires and move by moves everything in group. However, Left clicking on DrawRect and dragging does not work.

public void onModuleLoad() {
new DrawPane(){{
setWidth(640);
setHeight(480);
setCanDrag(true);
setBackgroundColor("#D9E4F6");
addDrawItem(new DrawGroup(){{
setTop(0);
setLeft(0);
setWidth(32);
setHeight(32);
setDrawItems(new DrawRect(){{
setHeight(32);
setWidth(32);
}}, new DrawLabel(){{
setTop(10);
setContents("Foo Bar");
}});
addClickHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
SC.say("yahoo!");
}
});
setCanDrag(true);
moveBy(40,40);
}}, true);
}}.draw();
}