Hi, Steve,

I always set the report datasource one datatable at a time.

By any chance, when you designed your report, did you design against tables that were in the back-end database (sql, oracle, etc.)? That can sometimes happen - if the report was designed against sql tables, you can get a login runtime prompt for any tables that aren't references when you do your runtime databinding.

What I do is loop through the report's database object, and match up against the tables in my dataset, like so...

private void SetData(DataSet DsReportData, ReportDocument oReport)
{
   foreach (Table oTable in oReport.Database.Tables)
      oTable.SetDataSource( DsReportData.Tables[ oTable.Name.ToString() ]);            
}

I can call that method both for the report object, as well as any subreports that may exist...

   this.SetData(DsReportData,oReport);

   foreach(ReportDocument oSubReport in oReport.Subreports) 
      this.SetData(DsReportData,oSubReport);

Hope that helps...
Kevin