Dynamically Loading User Control Textbox value remain same

Hi Everybody,
I have a problem with dynamically loaded user controls. My index.aspx page is divided into two divs the left and the right one.
This is page load function of the index.aspx

treeviewControl =  LoadControl(GetLocalResourceObject("module.path.webbitree").ToString());
treeWrapper.Controls.Add(treeviewControl);           

            if (!(String.IsNullOrEmpty(menuItemAttr.Value) && String.IsNullOrEmpty(menuAttr.Value)))
            {
                nodeToOperate = treeviewControl.MainPageTree.SelectedNode;
                controlToload = findUserControlForMenuItemToBeLoaded(menuAttr.Va ...