水晶报表使用PrintToPrinter打印时提示“缺少参数值”求高手指点！这是什么原因怎么解决？

public void PrintToPrinter(string strPrinterName, int ipices)
        {
            //直接设置A4格式纵向打印一份            if (!string.IsNullOrEmpty(strPrinterName))
            {
                if (m_strInvoiceType.Equals("DHL-A"))
                {
                    this.DHL_ACommercialInvoice1.PrintOptions.PrinterName = strPrinterName;
                    this.DHL_ACommercialInvoice1.PrintOptions.PaperSize = CrystalDecisions.Shared.PaperSize.PaperA4;
                    this.DHL_ACommercialInvoice1.PrintOptions.PaperOrientation = CrystalDecisions.Shared.PaperOrientation.Portrait;
                    this.DHL_ACommercialInvoice1.PrintToPrinter(ipices, false, 0, 0);//这个打印正常没有问题
                }
                if (m_strInvoiceType.Equals("DHL-D"))
                {
                    this.DHL_DCommercialInvoice1.PrintOptions.PrinterName = strPrinterName;
                    this.DHL_DCommercialInvoice1.PrintOptions.PaperSize = CrystalDecisions.Shared.PaperSize.PaperA4;
                    this.DHL_DCommercialInvoice1.PrintOptions.PaperOrientation = CrystalDecisions.Shared.PaperOrientation.Portrait;
                    this.DHL_DCommercialInvoice1.PrintToPrinter(ipices, false, 0, 0); //这个打印到达这里是报错提示“缺少参数值”
                }
                if (m_strInvoiceType.Equals("FedEx"))
                {
                    this.FedExcommercialinvoice1.PrintOptions.PrinterName = strPrinterName;
                    this.FedExcommercialinvoice1.PrintOptions.PaperSize = CrystalDecisions.Shared.PaperSize.PaperA4;
                    this.FedExcommercialinvoice1.PrintOptions.PaperOrientation = CrystalDecisions.Shared.PaperOrientation.Portrait;
                    //this.FedExcommercialinvoice1.PrintToPrinter(ipices, false, 0, 0);
                    this.FedExcommercialinvoice1.PrintToPrinter(ipices, false, 0, 0); //这个打印，到达这报错提示“文件 C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\temp_63b2c068-7c40-405a-9c4c-ed142861506f {1B848C3A-F215-419B-AEE7-A6AD038E8A68}.rpt 内出错：
无法连接：错误的登录参数。“
                }
            }
请高手指点下，这两个问题分别是什么原因造成的，怎么修改下解决这个问题？谢谢了！