Cannot retrieve an ADODB recordset using Com Interop Silverlight 4 and MS Access

Question

The ADO Recordset code below do not return any records in the code below. The ADO Command object and the ADO Connection works fine against my Access 2010 beta db.

I can Insert records, but not retrieve any. Any help is greatly appreciated.

:)=

THIS WORKS:
 string sMSAccess = "C:\\Users\\storltx\\Documents\\SL4Demo.accdb";

            try
            {
                using (dynamic ADOConnection = ComAutomationFactory.CreateObject("ADODB.Connection"))
                using (dynamic ADOCommand = ComAutomationFactory.CreateObject("ADODB.Command"))
                {
                    ADOConnection.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + sMSAccess + ";Persist Security Info=False";
                    ADOConnection.Open();
                    ADOCommand.ActiveConnection = ADOConnection;

                    ADOCommand.CommandText = @"INSERT INTO SL4Table ( [First], [Last] ) VALUES ('ABC', 'DEFG')";

                    ADOCommand.Execute();
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.InnerException.Message);
            }

THIS DOES NOT:

    string sMSAccess = "C:\\Users\\storltx\\Documents\\SL4Demo.accdb";


                try
                {

                    using (dynamic AdoConnection = ComAutomationFactory.CreateObject("ADODB.Connection"))
                    using (dynamic AdoCommand = ComAutomationFactory.CreateObject("ADODB.Command"))
                    {
                        AdoConnection.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + sMSAccess + ";Persist Security Info=False";
                        AdoConnection.Open();
                        AdoCommand.ActiveConnection = AdoConnection;

                        AdoCommand.CommandText = @"SELECT * FROM SL4Table";


                        // dynamic AdoReader = ComAutomationFactory.CreateObject("ADODB.recordset");
                        // AdoReader.Open(@"Select * From SL4Table", AdoConnection);
                        // dtGrid.ItemsSource = AdoReader;


                        dtGrid.ItemsSource = AdoCommand.Execute();

                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.InnerException.Message);
                }