JTree viser ikke alle børn

Jeg har to klasser, en "TreeNode" og en "TreeModel".

Jag smider i nogle værdier og allting er fint (jeg kigger i debug). Min ROOT har alle de børn han skal ha, etc.
Men alligevel så viser mit JTree KUN roden, og inget mer.

Kan ni finde hvor det bøvlende fejlen er?

------------------------TreeModel--------
    protected class CurrentUnsitcTreeModel implements TreeModel
    {
        private TreeNode _root;

        public CurrentUnsitcTreeModel(TreeNode root)
        {
            _root = root;
        }

        public void addTreeModelListener(TreeModelListener l) {}
        public Object getChild(Object parent, int index) { return parent != null ? ((UnsitcNode)parent).getChildAt(index) : null; }
        public int getChildCount(Object parent) { return parent != null ? ((UnsitcNode)parent).getChildCount() : 0; }
        public int getIndexOfChild(Object parent, Object child) { return parent != null ? ((UnsitcNode)parent).getIndex((UnsitcNode)child) : -1; }
        public Object getRoot() { return _root; }
        public boolean isLeaf(Object node) { return node != null ? ((UnsitcNode)node).isLeaf() : true; }
        public void removeTreeModelListener(TreeModelListener l) {}
        public void valueForPathChanged(TreePath path, Object newValue) {}

        public void refresh()
        {
        }
    }

------------------------TreeNode------
    protected class UnsitcNode extends DefaultMutableTreeNode implements Comparable
    {
        private Vector _children = new Vector();
        private Unsitc _item;

        public UnsitcNode(Unsitc item)
        {
            _item = item;
        }

        public Unsitc item() { return _item; }

        public int getChildCount() { return _children != null ? _children.size() : 0; }
        public TreeNode getChildAt(int index) { return _children != null ? (TreeNode)_children.get(index) : null; }
        public int getIndex(TreeNode node) { return _children != null ? _children.indexOf(node) : -1; }
        public boolean isLeaf() { return _children != null && _children.size() > 0; }
        public Enumeration children() { return _children != null ? _children.elements() : null; }
        public void addChild(UnsitcNode child)
        {
            if(_children != null)
            {
                _children.add(child);
                Collections.sort(_children);
            }
        }

        public int compareTo(Object other) { return toString().compareTo(other.toString()); }
        public boolean equals(Object other)
        {
            if(other instanceof UnsitcNode)
            {
                UnsitcNode un = (UnsitcNode)other;
                return ObjectUtil.equals(_item, un._item) &&
                      ObjectUtil.equals(_children, un._children);
            }
            return false;
        }

        public String toString() { return _item != null ? _item.toString() : ""; }
    }