如果我通过记事本发送东西(因此它的工作),打印机打印奇怪的字符

我有以下内容：

> POS for .Net v1.12.exe
> OPOSN1.11.16(针对.net的Espon Wrapper)
>安装了Espon驱动程序
>打印机的USB接口.

码：

private void FormLoad(object sender,System.EventArgs e)
        {

            //<<<step1>>>--Start
            //Use a Logical Device Name which has been set on the SetupPOS.
            string strLogicalName = "PosPrinter";
           // string strLogicalName = "ESDPRT001";

            try
            {
                //Create PosExplorer
                PosExplorer posExplorer = new PosExplorer();

                DeviceInfo deviceInfo = null;

                try
                {
                    deviceInfo = posExplorer.GetDevice(DeviceType.PosPrinter,strLogicalName);
                    m_Printer = (PosPrinter)posExplorer.CreateInstance(deviceInfo);
                }
                catch (Exception)
                {
                    ChangeButtonStatus();
                    return;
                }

                //Open the device
                m_Printer.Open();

                //Get the exclusive control right for the opened device.
                //Then the device is disable from other application.
                m_Printer.Claim(1000);

                //Enable the device.
                m_Printer.DeviceEnabled = true;
            }
            catch (PosControlException)
            {
                ChangeButtonStatus();
            }
            //<<<step1>>>--End

        }

错误：端口名称非法,或无法连接到设备.
在线：m_Printer.Claim(1000);