Problem getting selected rows in GridPanel

[mjbohn]

[update]
Nobody out there with same prob or some idea to solve it?
[/update]

Hi
I have a problem with getting selected rows from a GridPanel. I do all the coding in C# and everything works fine except getting these selected rows.
The GridPanel is nested inside a Window which is initalized at Page_Load.I'd like to fetch selectedrows with a button's DirectClick.
Some of my code:

    public partial class UserAdmin : System.Web.UI.Page

    {

        Window wndEditUser, wndEditRight, wndSelectRight, wndSelectRightFlat;
        GridPanel UserGrid;
        Ext.Net.Panel RightsPanel;

        protected void Page_Load(object sender, EventArgs e)

        {

            UserGrid = getUserGrid();
            RightsPanel = getRightsPanel();
            wndEditUser = buildWndEdituser();
            wndEditRight = buildWndEditRight();
            //wndSelectRight = buildWndSelectRight();
            wndSelectRightFlat = buildWndSelectRightFlat();
 
            BorderLayout MainVpLayout = new BorderLayout();
           

            MainVpLayout.North.Items.Add(getNorthPanel());
            MainVpLayout.Center.Items.Add(getCenterPanel());
            MainVpLayout.West.Items.Add(getWestPanel());


            Viewport MainVp = new Viewport();
            MainVp.ID = "MainViewport";

            MainVp.Items.Add(MainVpLayout);

            this.Controls.Add(MainVp);
            this.Controls.Add(wndEditUser);
            this.Controls.Add(wndEditRight);
            //this.Controls.Add(wndSelectRight);
            this.Controls.Add(wndSelectRightFlat);
         

        }


        private Window buildWndSelectRightFlat()

        {

            GridPanel rightsGP = new GridPanel();
            rightsGP = getAllRightsGrid();
           

            Toolbar tb = new Toolbar();
            Ext.Net.Button btnOk = new Ext.Net.Button();
            btnOk.Text = "speicher";
            btnOk.ID = "btnOk_wndSelectRightFlat";
            btnOk.Icon = Icon.Accept;
            btnOk.DirectClick += new ComponentDirectEvent.DirectEventHandler(btnOk_DirectClick);

            Ext.Net.Button btnCancel = new Ext.Net.Button("abbrechen", "#{wndSelectRightFlat}.hide()");
            btnCancel.Icon = Icon.Decline;

            tb.Items.Add(new ToolbarFill());
            tb.Items.Add(btnOk);
            tb.Items.Add(btnCancel);

            Window w = new Window();
            w.Hidden = true;
            w.CloseAction = CloseAction.Hide;
            w.ID = "wndSelectRightFlat";
            w.Modal = true;
            w.Height = 300;
            w.Width = 500;
            w.Resizable = true;
            w.Layout = "fit";
            w.CustomConfig.AddRange(cic);
            w.Add(rightsGP);
            w.BottomBar.Add(tb);
            return w;


        }

 

        void btnOk_DirectClick(object sender, DirectEventArgs e)
        {
            //(FindControl("wndSelectRightFlat") as Window).Hide();
            //RowSelectionModel rsm = new RowSelectionModel();

            RowSelectionModel rsm = (FindControl("AllRightsGrid") as GridPanel).SelectionModel.Primary as RowSelectionModel;
            //rsm.SelectAll();

            X.Msg.Alert("Submit", rsm.SelectedRows.Count.ToString()).Show();

        }

 

 

        private GridPanel getAllRightsGrid()

        {

             SqlDataSource ds = new SqlDataSource();
            ds.ConnectionString = ConfigurationManager.ConnectionStrings["AKV_ConnectionString"].ConnectionString;
            ds.SelectCommand = "EXEC [metadata].[perm_get_all_rights_flat]";


            JsonReader reader = new JsonReader();
            reader.Fields.Add("right_id");
            reader.Fields.Add("cname");
            reader.Fields.Add("name");
            reader.Fields.Add("display_name");

            Store store = new Store();
            store.ID = "AllRightsGridStore";
            store.DataSource = ds;
            store.Reader.Add(reader);

            if (!X.IsAjaxRequest)
            {
                store.DataBind();
            }
          

            Column col;
            ColumnCollection cc = new ColumnCollection();

            col = new Column();
            col.Header = "Right ID";
            col.ColumnID = "right_id";
            col.DataIndex = "right_id";
            cc.Add(col);

            col = new Column();
            col.Header = "cname";
            col.ColumnID = "cname";
            col.DataIndex = "cname";
            cc.Add(col);
 

            col = new Column();
            col.Header = "name";
            col.ColumnID = "name";
            col.DataIndex = "name";
            cc.Add(col);


            col = new Column();
            col.Header = "display_name";
            col.ColumnID = "display_name";
            col.DataIndex = "display_name";
            cc.Add(col);

            RowSelectionModel sm = new RowSelectionModel();
            //sm.ID = "rsmtest";

            //sm.Listeners.RowSelect.Handler = "alert( rowIndex   )";

 

            GridPanel gp = new GridPanel();
            gp.ColumnModel.Columns.AddRange(cc);
            gp.SelectionModel.Add(sm);
            gp.Title = "Rights";
            gp.ID = "AllRightsGrid";
            gp.LoadMask.ShowMask = true;
            gp.Store.Add(store);

            return gp;

        }

Inside btnOk_DirectClick I'm able to fetch the RowSelectionModel

RowSelectionModel rsm = (FindControl("AllRightsGrid") as GridPanel).SelectionModel.Primary as RowSelectionModel;

I checked rsm.ID to be sure having the right selection model. Even

rsm.SelectAll()

works fine.
But selected rows is always empty. What did I wrong?

Thanks in advance
cu
Michael