AccessViolationException after upgrade to 2008

Question

I have just now upgraded from the crystal reports basic version that comes with visual studio 2008 to the full Crystal Reports 2008. On opening a project it came up with the upgrade adviser thing and I ran it through seemed to work and compiled properly on running the reports unfortunately I am getting an AccessViolationException.
CrystalRepSource.Report.FileName = report2;
                //CrystalRepSource.ReportDocument.SetDatabaseLogon(Application["user"].ToString(), Application["pass"].ToString(),
                //    Application["server"].ToString(), Application["db"].ToString(), true);
                //section fills the datasource sets the report title
                FillStudentRegistersDataTable(studentDataTable, reportSource
                                                , pfItem1, dcItem1
                                                , pfItem2, dcItem2
                                                , pfItem3, dcItem3
                                                , pfItem4, dcItem4
                                                , pfItem5, dcItem5
                                                , pfItem6, dcItem6
                                                , pfItem7, dcItem7
                                                , pfItem8, dcItem8
                                                , pfItem9, dcItem9
                                                , pfItem10, dcItem10, paramFields);
                //tidy up bind dataset refresh report...
                CrystalRepSource.ReportDocument.SetDataSource((DataTable) studentDataTable);
                CrystalRepSource.DataBind();
                CrystalViewer.ReportSource = CrystalRepSource;
                CrystalViewer.DataBind();
The above is a snippet of the code this is a push report so it first fills a student registers data table. The error comes up on th eline underneath CrystalRepSource.ReportDocument.SetDataSource((DataTable) studentDataTabel).
I thought it might be push reports so I tried another this failed on trying to set logon info:
TableLogOnInfo logOnInfo = new TableLogOnInfo();
logOnInfo = CrystalRepSource.ReportDocument.Database.Tables[0].LogOnInfo;
Any ideas what the problem is as the error is a bit generic suggests possible memory corruption but that is definately not it. The reports were definately working pre upgrade and I do have a backup but would like to resolve this ASAP as I want to use some of the powerful new features.
p.s. this has service pack 0 installed

Answer 1

Forgot here is the stack trace:
at CrystalDecisions.ReportAppServer.ClientDoc.ReportClientDocumentClass.get_ProductLocaleID()
   at CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.get_ProductLocaleID()
   at CrystalDecisions.ReportSource.CachedObjectReportSource.GetReport(RequestContext context, Boolean bAddToCacheWhenCreated)
   at CrystalDecisions.ReportSource.CachedObjectReportSource.InternalGetReport(RequestContext context, Boolean bAddToCacheWhenCreated)
   at CrystalDecisions.Web.CrystalReportSource.get_ReportDocument()
   at RegisterReportViewer.ReportParameter(String report, String reportSource) in c:\Visual Studio 2008\WebSites\MIU_web\RegisterReports\RegisterReportViewer.aspx.cs:line 295
   at RegisterReportViewer.OnPreRender(EventArgs e) in c:\Visual Studio 2008\WebSites\MIU_web\RegisterReports\RegisterReportViewer.aspx.cs:line 16
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)