Dynamic generate control loss state of selection

protected void Page_Load(object sender, EventArgs e)
    {
        PopulateLeftSearchPane();

}

PopulateLeftSearchPane()
{
    UpdatePanel myupdpnl = new UpdatePanel();
               myupdpnl.ID = "upnl" + cn.AspectID + "_" + cn.TraitID;

                CheckBox chk = new CheckBox();
                chk.ID = "chktrait" + cn.AspectID + "_" + cn.TraitID;
                //string uniqueID = System.Guid.NewGuid().ToString().Substring(0, 5);
                //chk.ID = "chktrait";
                //chk.ID = "chktrait" + cn.AspectID + "_" + cn.TraitID + uniqueID;
                chk.Text = cn.ValueName;
                chk.Attributes.Add("AspectID", cn.AspectID.ToString());
                chk.Attributes.Add("TraitID", cn.TraitID.ToString());

                chk.AutoPostBack = false;
                //CheckBox chk = (CheckBox)ctrl;
                //  chk.CheckedChanged += new EventHandler(CheckBox_CheckChanged);
                // chk.CheckedChanged += new EventHandler(this.CheckBox_Click);
                chk.Attributes.Add("onchange", "Javascript:return CallSearchResults('" + chk.ID + "','" + cn.AspectID + "','" + cn.TraitID + "','" + cn.ValueName + "'" + ");");
                myupdpnl.ContentTemplateContainer.Controls.Add(chk);
              
                //myupdpnl.ContentTemplateContainer.Controls.Add(chk);

                divaccordioninner.Controls.Add(myupdpnl);
}




protected void btnSearchResult_Click(object sender, EventArgs e)
    {

        ProcessControls(divLeftpane,false);
     

    }

private void ProcessControls(Control ctrlContainer, bool Isall)
    {
        foreach (Control ctrl in ctrlContainer.Controls)
        {
            if (ctrl.GetType() == typeof(TextBox))
            {
                // Do whatever to the TextBox
            }

            else if (ctrl.GetType() == typeof(CheckBox))
            {
                // Do whatever to the TextBox
                //Response.Write(ctrl.UniqueID);
                CheckBox chk = (CheckBox)ctrl;
                if (Isall == false)
                {
                    if (chk.Checked)
                    {
                        Int64 intAspectID = Convert.ToInt64(chk.Attributes["AspectID"]);
                        Int64 intTraitID = Convert.ToInt64(chk.Attributes["TraitID"]);
                        SearchResult(intAspectID, intTraitID);
                    }
                }
                else
                {
                    Int64 intAspectID = Convert.ToInt64(chk.Attributes["AspectID"]);
                    Int64 intTraitID = Convert.ToInt64(chk.Attributes["TraitID"]);
                    SearchResult(intAspectID, intTraitID);
                }
            }
            else if (ctrl.GetType() == typeof(RadioButton))
            {
                // Do whatever to the TextBox
            }
            else if (ctrl.GetType() == typeof(Image))
            {
                // Do whatever to the TextBox
            }

            if (ctrl.HasControls())
            {
                if (Isall == false)
                {
                    ProcessControls(ctrl, false);
                }
                else
                {
                    ProcessControls(ctrl, true);
                }
            }
        }


    }