Crystal Reports upgrade from 9 to 13

Here's my dilemma: We're upgrading our web app from .NET 1 to .NET 4 and everything is going great. We have 56 reports that we use to output pdf's for correspondence letters, invoices, etc. Everything was working properly when we were running in .NET 1 using VS 2003 and CR 9.

Now we are running CR 13 for VS 2010 and .NET 4 and I have all of these working in the new environment with the new .NET version, except for a handful, all of which rely on a sql view as a report datasource. Possible issue?

The reports load, there are no errors, but the data is missing. Hopefully someone can help.

DataTable dt = new DataTable();
dt = (DataTable)Session["ReportsTable"];
ReportDocument oRpt = new ReportDocument();
string strReport = FSL.FSLReportManager.Reports.GetReportAppSetting(ddm) + objReport.FileName;
oRpt.Load(strReport,OpenReportMethod.OpenReportByTempCopy);
dt.TableName = oRpt.Database.Tables[0].Name;
ExportPDF(this.Page,oRpt,dt);

private void ExportPDF(Page pg, ReportDocument rClass, DataTable dt)
		{   
			rClass.SetDataSource(dt);
                        ExportOptions exp = new ExportOptions();
                        exp.ExportFormatType = ExportFormatType.PortableDocFormat;
                        exp.FormatOptions = new PdfRtfWordFormatOptions();
                        ExportRequestContext req = new ExportRequestContext();
                        req.ExportInfo = exp;
                        System.IO.Stream st;
                        rClass.FormatEngine.ExportToStream(req);
                        st = rClass.FormatEngine.ExportToStream(req);
                        pg.Response.ClearHeaders();
                        pg.Response.ClearContent();
                        pg.Response.ContentType = "application/pdf";
                        byte[] b = new byte[st.Length];
                        st.Read(b, 0, (int)st.Length);
                        pg.Response.BinaryWrite(b);
                        pg.Response.End();
		}

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I can verify that the report loads data in the report preview.
I can verify that the datatable contains all of the data.

What am  I missing?