Crystal Reports ReportDocument.SaveAs()

Message

   Hi,

I'm a bit in a jam.  We want to change from Paradox 7 (don't ask) to SQL Server.  Which is easy enough.  Problem is there are more than 400 reports (with who knows how many subreports in them) which the datasource needs to change.  So I decided to plunge in the deep end and managed to change them with code similiar to :

ReportDocument doc = new ReportDocument();

try

{
doc.Load(stReport);
lResult = ProcessReportTables(doc);
if (ReportHasChanged)

{
string NewReport = NewReportName(stReport);

doc.SaveAs(NewReport);
}
}
to process the report, I find all the tables in the report and for each table do :

private bool DoReportTable(CrystalDecisions.CrystalReports.Engine.Table table)

{
table.LogOnInfo.ConnectionInfo.DatabaseName = ... ; table.LogOnInfo.ConnectionInfo.ServerName = ... ;

} 

The doc.SaveAs(NewReport) gets executed and the 'new' .rpt file is there, but the report still refers to the old Paradox 7 tables.

Any ideas what I'm doing wrong ?