Problem reading values from custom treenode template's controls (works for subtrees but not for root tree)

[Askar]

Hello,

I use a RadTree with custom format of its elements. Namely, each element has also 3 radio buttons as RadioButtonList, defined in a custom template. The code used to create items of new radTree is:

RadTreeNode node = new RadTreeNode(usedName + " [" + rs.ToString() + "]", "SECTION_" + rs.ToString()); // just some name and value

node.NodeTemplate = new AdminFunctionsPhenoTreeTemplate(); // makes buttons

node.ExpandMode = TreeNodeExpandMode.ServerSideCallBack;

PhenoTree.Nodes.Add(node); // adding node to RadTree.

// selections.

RadioButtonList rbRights = (RadioButtonList)node.FindControl("rbRights");

if (rbRights != null)

{

  setAccessLevelToRB(rbRights, accessLevel); // set correct radio button using rbRights.SelectedIndex
}

node.DataBind();

This code successfully creates desired nodes and setAccessLeveltToRB indeed sets desired radio button as instructed.

The very same code used to create sub-trees in server side callback - I use dynamic creation of subtrees after user wants to expand the tree. The only formal difference, it attaches new subtree to Nodes property of a parent node (as opposed to RadTree "PhenoTree" object here, of course). 

When I receive a postback, I read the values of radio buttons like this:

List<RadTreeNode> alls = (List<RadTreeNode>)PhenoTree.GetAllNodes();
            foreach (RadTreeNode node in alls)
            {
                RadioButtonList rbRights = (RadioButtonList)node.FindControl("rbRights");
               accessLevel = getAccessLevelFromRB(rbRights); // this routine simply examines rbRights.SelectedIndex

}

 But buttons of primary root tree, created by the snippet above, always return default value, neither the one I inserted either in creation code (albeit it was reflected on screen) nor that I selected by mouse.

Template:

class AdminFunctionsPhenoTreeTemplate : ITemplate
      {
          public void InstantiateIn(Control container)
          {
              container.Controls.Add(new LiteralControl("<table style=\"margin:0px;padding:0px;\"><tr><td>"));
              Label label1 = new Label();
              label1.ID = "ItemLabel";
              label1.Text = "Text";
              label1.Font.Size = 8;
              // label1.Font.Bold = true;
              label1.DataBinding += new EventHandler(label1_DataBinding);

              container.Controls.Add(label1);
              container.Controls.Add(new LiteralControl("</td><td>"));
              RadioButtonList rbRights = new RadioButtonList();
              rbRights.ID = "rbRights";
              rbRights.Items.Add(new ListItem("r/o"));
              rbRights.Items.Add(new ListItem("r/w"));
              rbRights.Items.Add(new ListItem("r/w/meta"));
              rbRights.SelectedIndex = 0;
              rbRights.RepeatDirection = RepeatDirection.Horizontal;
              container.Controls.Add(rbRights);
              container.Controls.Add(new LiteralControl("</td></tr></table>"));
          }

          private void label1_DataBinding(object sender, EventArgs e)
          {
              Label target = (Label)sender;
              RadTreeNode node = (RadTreeNode)target.BindingContainer;
              string nodeText = (string)DataBinder.Eval(node, "Text");
              target.Text = nodeText;
          }

      }

I wonder what I am missing, please help me to make this work!