Crystal Subreport

I have a Crystal Report that I wanto to print from VB.net. I was able to do that with no problem until I added a subreport to the main report. The subreport is NOT a standalone report. The code below is what I used to print the report prior to adding the subreport.
VB Code:
ord.Fill(ords)
        Dim crdoc As New ReportDocument
        crdoc.Load("C:\QBSautoproj\Orders.rpt")
        crdoc.SetDataSource(ords)
        Try
            crdoc.PrintToPrinter(1, True, 0, 0)
        Catch ex As Exception
            MsgBox(ex.ToString)
After adding the subreport this fails on one of the fields of the subreport. Do I have to somehow include that in the code as another report?
Thanks,
Russ