Invoice Item

Running into a problem.  I'm trying to see the invoice items on an invoice.  I have pulled the invoice up in Netsuite and looked at the in through the UI and it definitely has items priced out on it.  But when I access the invoice through C# and web services, it shows that the Invoice Item List is null.  Any ideas?

Here is a sample of the code:

        Record[] records = response.recordList;
        for (int i = 0, j = (response.pageIndex - 1) * response.pageSize; i < records.Length; i++, j++)
        {
            Invoice PinnInvoice = (Invoice)records[i];
            InvoiceItemList itemlist = PinnInvoice.itemList;
            InvoiceItem[] items = itemlist.item;