Getting a connection not initialized when using SqldataReaer

I'm not familiar with using the DataReader and I am a noice in C#.  I am getting the following exeception error when trying to make a database connection vai asp.net . I'm trying to test a PDF Generator product from a company called cete software. I'm sure I'm missing something big a obvious but I'm not sure what. I have used System.Data.DataTable  successfully many times, this is my first attempt with DataReader. Just looking for ideas on where to look.

Here is the error in the event log:
Exception information:
    Exception type: InvalidOperationException
    Exception message: ExecuteReader: Connection property has not been initialized.

Here is the sections of my code page that deal with the connection. I am obvious closing the System.Web.UI.Page and Pageload sections later on in the code.

public partial class WebApp_Steve_TableReport : System.Web.UI.Page
   {
       
        static string dBConnString =
              System.Configuration.ConfigurationSettings.AppSettings["DFSConnectionString2"];

        protected void Page_Load(object sender, System.EventArgs e)
            {
                  // Establises connection to the database
                  SqlConnection connection = GetOpenDBConn();
                  SqlDataReader data = GetContactListData( connection );


      private SqlConnection GetOpenDBConn()
            {
      // Creates and opens a database connection
            SqlConnection connection = new SqlConnection( dBConnString );
            connection.Open();
          return connection;
           }
   
 private SqlDataReader GetContactListData( SqlConnection connection )
     {
            string from = "09/01/2007";
            string to = "09/24/2007";
            string siteId = "3";
            string transType = "1";
                       
SqlCommand storedProcCommand = new  SqlCommand   "sp_REPORT_CheckDailySumBySettleDate_DFSOPS");
            storedProcCommand.CommandType = CommandType.StoredProcedure;
            storedProcCommand.Parameters.Add("@sinceWhen", from);
            storedProcCommand.Parameters.Add("@untilWhen", to);
            storedProcCommand.Parameters.Add("@siteid", siteId);
            storedProcCommand.Parameters.Add("@transtype", transType);

     SqlDataReader dataReader = storedProcCommand.ExecuteReader();
     return dataReader;
    }