Cannot load CrystalReportViewer even with good connection information.

This is my first attempt at using a CrystalReportViewer control, so please forgive me if I'm making some obvious mistake.

Here are the steps I'm taking to try to populate it with a very simple report (just a couple of fields dragged over).  Some of this may be overkill or unnecessary but I've been tearing my hair out trying to figure out what the missing bit of magic is.

1. new the ReportDocument object
2. Call ReportDocument.Load( reportpath.rpt)
3. Iterate through each IConnectionInfo object in ReportDocument.DataSourceConnections

3.1 call IConnectionInfo.SetConnection( serverName, databaseInstanceName, true) for each one

4. Iterate through each Table object in ReportDocument.Database.Tables

4.1 Create a new ConnectionInfo object and set .ServerName, .DatabaseName, and .IntegratedSecurity

4.2 Assign that object to Table.LogOnInfo.ConnectionInfo

4.3 Call Table.ApplyLogOnInfo( Table.LogOnInfo );

4.4 Assign Table.Location = database + ".dbo." + toApplyTo.Location.Substring( toApplyTo.Location.LastIndexOf( "." ) + 1 );

4.5 Call Table.TestConnectivity *NOTE: THIS NEVER FAILS*

5. Repeat the process for any subreports ( there are none in my test reports)
6. Call ReportDocument.VerifyDatabase() *NOTE: THIS NEVER FAILS*
7. Assign CrystalReportViewer.ReportSource = ReportDocument



The control loads with no data, just as I see it in the designer.

What am I doing wrong?

My code (_workingDb is my database wrapper object in other parts of the application, but here I'm just using it as a container for the relevant information):

		private void FormReport_Load( object sender, EventArgs e )
		{
			ReportDocument toShow = new ReportDocument();
			toShow.Load( _reportPath );


			this.Text = toShow.Name;

			SetConnectionInfo( toShow, _workingDb.ServerName, _workingDb.DatabaseName );

			toShow.VerifyDatabase();

			crystalReportViewerMain.ReportSource = toShow;

		}


		private void SetConnectionInfo( ReportDocument toShow, string server, string database )
		{
			foreach( IConnectionInfo connInfo in toShow.DataSourceConnections )
			{
				connInfo.SetConnection( server, database, true );
			}

			foreach( Table toApplyTo in toShow.Database.Tables )
			{

				TableLogOnInfo toAlter = toApplyTo.LogOnInfo;


				ConnectionInfo newConnection = new ConnectionInfo();
				//don't know if this has any impact, fails either way
				//newConnection.Type = ConnectionInfoType.SQL;
				newConnection.ServerName = server;
				newConnection.DatabaseName = database;
				newConnection.IntegratedSecurity = true;
				//not sure what this does...seems undocumented
				//toAlter.ConnectionInfo.AllowCustomConnection = true;

				toAlter.ConnectionInfo = newConnection;


				toApplyTo.ApplyLogOnInfo( toAlter );

				toApplyTo.Location = database + ".dbo." + toApplyTo.Location.Substring( toApplyTo.Location.LastIndexOf( "." ) + 1 );
				if( !toApplyTo.TestConnectivity() )
				{
					MessageBox.Show( "ERROR: could not establish connection to table (" + toApplyTo.Name + ")." );
				}

			}

			foreach( ReportDocument subReport in toShow.Subreports )
			{
				SetConnectionInfo( subReport, server, database );
			}
		}

//DEBUGGING SIMPLE STUFF
		private void crystalReportViewerMain_DoubleClick( object sender, EventArgs e )
		{
			crystalReportViewer.Focus();
			crystalReportViewer.Refresh();
			int pageNum = crystalReportViewer.GetCurrentPageNumber();
			crystalReportViewer.Refresh();
			crystalReportViewer.InitReportViewer();
			crystalReportViewer.Refresh();
			crystalReportViewer.PerformAutoScale();
			crystalReportViewer.Refresh();
			crystalReportViewer.PerformLayout();
			crystalReportViewer.Refresh();
			crystalReportViewer.Refresh();
			crystalReportViewer.Refresh();
			crystalReportViewer.RefreshReport();
			crystalReportViewer.Refresh();
			crystalReportViewer.Show();
			crystalReportViewer.Refresh();
			crystalReportViewer.ShowFirstPage();
			crystalReportViewer.Refresh();
			crystalReportViewer.ShowNextPage();
			crystalReportViewer.Refresh();
			crystalReportViewer.ShowLastPage();
			crystalReportViewer.Refresh();
			crystalReportViewer.Update();
			crystalReportViewer.Refresh();

		}

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Thanks,

-David