Problem in connecting to the device via zkemkeeper.dll in windows application c# .net

See more:

C#

.NET

RFID

biometrics

I'm trying to connecting RFID and biometrics devices in network, my loacal ip is 192.168.1.24 and the RFID device ip is 192.168.1.22, i'm using Visual studio 12 an sample windows application. to connect this device but it through an error "Unable to connect the device,error code = -201" . please do help thanks in advance.

What I have tried:

private void btnConnect_Click(object sender, EventArgs e)
{
if (txtIP.Text.Trim() == "" || txtPort.Text.Trim() == "")
{
MessageBox.Show("IP and Port cannot be null", "Error");
return;
}

int idwErrorCode = 0;
Cursor = Cursors.WaitCursor;

if (btnConnect.Text == "DisConnect")
{
axCZKEM1.Disconnect();

this.axCZKEM1.OnVerify -= new zkemkeeper._IZKEMEvents_OnVerifyEventHandler(axCZKEM1_OnVerify);
this.axCZKEM1.OnAttTransactionEx -= new zkemkeeper._IZKEMEvents_OnAttTransactionExEventHandler(axCZKEM1_OnAttTransactionEx);
this.axCZKEM1.OnNewUser -= new zkemkeeper._IZKEMEvents_OnNewUserEventHandler(axCZKEM1_OnNewUser);
this.axCZKEM1.OnHIDNum -= new zkemkeeper._IZKEMEvents_OnHIDNumEventHandler(axCZKEM1_OnHIDNum);
this.axCZKEM1.OnWriteCard -= new zkemkeeper._IZKEMEvents_OnWriteCardEventHandler(axCZKEM1_OnWriteCard);
this.axCZKEM1.OnEmptyCard -= new zkemkeeper._IZKEMEvents_OnEmptyCardEventHandler(axCZKEM1_OnEmptyCard);

bIsConnected = false;
btnConnect.Text = "Connect";
lblState.Text = "Current State:DisConnected";
Cursor = Cursors.Default;
return;
}

axCZKEM1.PullMode = 1;
bIsConnected = axCZKEM1.Connect_Net(txtIP.Text.Trim(), Convert.ToInt32(txtPort.Text.Trim()));


if (bIsConnected == true)
{
btnConnect.Text = "DisConnect";
btnConnect.Refresh();
lblState.Text = "Current State:Connected";
iMachineNumber = 1;//In fact,when you are using the tcp/ip communication,this parameter will be ignored,that is any integer will all right.Here we use 1.

if (axCZKEM1.RegEvent(iMachineNumber, 65535))//Here you can register the realtime events that you want to be triggered(the parameters 65535 means registering all)
{
this.axCZKEM1.OnVerify += new zkemkeeper._IZKEMEvents_OnVerifyEventHandler(axCZKEM1_OnVerify);
this.axCZKEM1.OnAttTransactionEx += new zkemkeeper._IZKEMEvents_OnAttTransactionExEventHandler(axCZKEM1_OnAttTransactionEx);
this.axCZKEM1.OnNewUser += new zkemkeeper._IZKEMEvents_OnNewUserEventHandler(axCZKEM1_OnNewUser);
this.axCZKEM1.OnHIDNum += new zkemkeeper._IZKEMEvents_OnHIDNumEventHandler(axCZKEM1_OnHIDNum);
this.axCZKEM1.OnWriteCard += new zkemkeeper._IZKEMEvents_OnWriteCardEventHandler(axCZKEM1_OnWriteCard);
this.axCZKEM1.OnEmptyCard += new zkemkeeper._IZKEMEvents_OnEmptyCardEventHandler(axCZKEM1_OnEmptyCard);
}

MyCountFinger = 1;
MyCountFace = 2;

}
else
{
axCZKEM1.GetLastError(ref idwErrorCode);
MessageBox.Show("Unable to connect the device,ErrorCode=" + idwErrorCode.ToString(), "Error");
}
Cursor = Cursors.Default;
}