Problemer med panel i placeholder

Hej

Jeg forsøger at putte en panel i en placeholder, men hver gang jeg putter en panel ind, forsvinder den forrige.

min kode ser således ud :
#code start
  Panel[] lstFeature = new Panel[5];
  TextBox rating = new TextBox();

  chkFeature.CheckedChanged += new EventHandler(FeaturePannel);

  lstFeature[features-1] = new Panel();
  plhSearchHolder.Controls.Add(lstFeature[features-1]);

    private void FeaturePannel(object sender, System.EventArgs e)
    {
      CheckBox chkFeat = new CheckBox();
      chkFeat = (CheckBox)sender;

      string fId = chkFeat.ID;
      int featix = Int32.Parse(fId);

      if (chkFeat.Checked)
      {
        rating.Text = "test";
        lstFeature[featix-1].Controls.Add(rating);
      }
      else
      {
        lstFeature[featix-1].Controls.Remove(rating);
      }

      lstFeature[featix-1].Height = featuredetailsHeight;
      lstFeature[featix-1].Width = featuredetailsWith;
      lstFeature[featix-1].Style.Add("top", "" + (baseTop+(space*(featix-1))) + "px");
      lstFeature[featix-1].Style.Add("left", "" + featuredetailCol + "px");
      lstFeature[featix-1].Style.Add("position", "absolute");
      lstFeature[featix-1].EnableViewState = true;
      lstFeature[featix-1].DataBind();

    }

#code slut


Jeg forstår ikke helt hvorfor det ikke virker, da nedenstående virker fint blot bruger jeg
her checkBoxList.

#code start

  CheckBoxList[] lstFeaturedetails = new CheckBoxList[5];

  chkFeature.CheckedChanged += new EventHandler(FeaturedetailsPannel);

  lstFeaturedetails[features-1] = new CheckBoxList();
  plhSearchHolder.Controls.Add(lstFeaturedetails[features-1]);


    private void FeaturedetailsPannel(object sender, System.EventArgs e)
    {
      CheckBox chkFeat = new CheckBox();
      chkFeat = (CheckBox)sender;

      string fId = chkFeat.ID;
      int featix;
      featix = Int32.Parse(fId);

      //      populate Featuredetail list
      string sqlString =  "sqlstring";
      ArrayList FeaturedetailSelection = new ArrayList();
      if (chkFeat.Checked)
      {
        MovieDb.MdbPassSqlsCommand(sqlString);
        MovieDb.MdbConnectionOpen();
        MovieDb.MdbExecuteReader();
        pSelection featureDetails = new pSelection();
        while (MovieDb.MdbDataRead())
        {
          featureDetails = new pSelection();
          featureDetails.sName = MovieDb.MdbGetString("FeatureDetailname");
          featureDetails.sValue = MovieDb.MdbGetInt("Id");
          FeaturedetailSelection.Add (featureDetails);
        }
        MovieDb.MdbConnectionClose();
      }
      else
      {
        FeaturedetailSelection.Remove(sender);
      }
      lstFeaturedetails[featix-1].Height = featuredetailsHeight;
      lstFeaturedetails[featix-1].Width = featuredetailsWith;
      lstFeaturedetails[featix-1].Style.Add("top", "" + (baseTop+(space*(featix-1))) + "px");
      lstFeaturedetails[featix-1].Style.Add("left", "" + featuredetailCol + "px");
      lstFeaturedetails[featix-1].Style.Add("position", "absolute");
      lstFeaturedetails[featix-1].EnableViewState = true;
      lstFeaturedetails[featix-1].RepeatDirection = RepeatDirection.Horizontal;

      lstFeaturedetails[featix-1].DataTextField = "sName"; // Navnet på den property på dine dataobjekter der skal være tekst
      lstFeaturedetails[featix-1].DataValueField = "sValue"; //Navnet på den property på dine dataobjecter der skal være value
      lstFeaturedetails[featix-1].DataSource = FeaturedetailSelection;
      lstFeaturedetails[featix-1].DataBind();
    }


Altså hvis jeg bruger panel så virker det ikke og hvis jeg bruger checkboxlist så virker det fint.

Hvorfor denne forskel, er der noget man skal gøre specielt når det er panel man bruger?

Er der nogen der har et bud på hvad det kan være?