SqlDataSource with parameter

I just want to select records with a certain date field > today's date:


SelectCommand="SELECT * FROM [Events] WHERE [Startdate] > ? "
OnSelected="src1_Selected">









---------------------

protected void srcEvents_Selected(object sender,
SqlDataSourceStatusEventArgs e)

{

e.Command.Parameters["Startdate"].Value = DateTime.Today;

}

-------------------

I have a list control bind to this data source but when executed the list
doesn't show. That means no record is selected. I know there are
qualifying records since I input them myself in SQL server.

Am newbie so I must code something wrong. Any insignt appreciated.