denotes a 'field' where a 'class' was expected

jeg har et asp.net projekt hvor jeg fylder en dropdown boks ud fra et dataset
men jeg får den her fejl:
'dstproto.WebForm1.yearDrop' denotes a 'field' where a 'class' was expected

koden er her:
string ConnStr = System.Configuration.ConfigurationSettings.AppSettings.Get("connStr");
            MySqlConnection Conn = new MySqlConnection(ConnStr);
            Conn.Open();

            string SelectStr =  "SELECT name,description,file,dstid,year FROM statistik WHERE dstid = '"+dstid+"' ORDER BY statid DESC";
            MySqlDataAdapter statAdapter = new MySqlDataAdapter(SelectStr, ConnStr);
            DataSet statSet = new DataSet();
            statAdapter.Fill(statSet, "statistik");
            Conn.Close();

            yearDrop.DataSource = statSet.Tables[0];
            yearDrop.DataValueField = "statid";
            yearDrop.DataTextField = "year";
            yearDrop.DataBind();