Crystal Report problem in sum of data

Hey guys
Im having a problem in my crystal report where i want to see the sum of the quantity of items and their subtotal but my crystal report seems to sum the wrong data

here is the data when i run my program and preview the crystal report:
Attachment 104717

what i want to see is the sum of the quantity and the subtotal not the number of items listed in the report

but when i preview the crystal report using report preview the sum of data is working

here is the crystal report when i don't run my program:
Attachment 104719



here is my code when viewing crystal report in my program:

Code:

---

Public Sub ReportTotalSalesItems(ByVal LV As ListView)
        Dim rReport As New ReportTotalSales
        Dim row As DataRow = Nothing
        Dim ds As New DataSet
        ds.Tables.Add("SalesTransactionDetails")
        With ds.Tables(0).Columns
            .Add("InvoiceNo")
            .Add("ProductCode")
            .Add("ProductName")
            .Add("QuantitySold")
            .Add("SubTotal")
        End With
        For Each LVI As ListViewItem In LV.Items
            row = ds.Tables(0).NewRow
            row(0) = LVI.Text
            row(1) = LVI.SubItems(1).Text
            row(2) = LVI.SubItems(2).Text
            row(3) = LVI.SubItems(3).Text
            row(4) = LVI.SubItems(4).Text
            ds.Tables(0).Rows.Add(row)
        Next
        rReport.SetDataSource(ds.Tables(0))
        ReportViewer.CrystalReportViewer1.ReportSource = rReport

---

please help me guys :(

I Solved it.. when i add the data in the crystal report it converts my data to string thats why the report uses COUNT instead of SUM. So I use the "ToNumber" formula in crystal report then inserted it as the substitute for quantity and subtotal.