USB client and CDC driver

NETMF & Gadgeteer
1

I am running the USB client cdc sample and I am getting the following exception at Controller.ActiveDevice = vsp.

 #### Exception System.InvalidOperationException - CLR_E_INVALID_OPERATION (1) ####
    #### Message: 
    #### GHI.Usb.Client.RawDevice::NativeInitialize [IP: 0000] ####
    #### GHI.Usb.Client.RawDevice::Activate [IP: 00f3] ####
    #### GHI.Usb.Client.Controller::set_ActiveDevice [IP: 0015] ####
    #### SerialPortTesting.Program::Main [IP: 0010] ####

Code :

 Cdc vsp = new Cdc();
//activedevice is null
            Controller.ActiveDevice = vsp;

            // Send "Hello world!" to PC every second. (Append a new line too)
            byte[] bytes = System.Text.Encoding.UTF8.GetBytes("Hello world!\r\n");
            while (true)
            {
                // Check if connected to PC
                if (Controller.State !=
                    UsbController.PortState.Running)
                {
                    Debug.Print("Waiting to connect to PC...");
                }
                else
                {
                    vsp.Stream.Write(bytes, 0, bytes.Length);
                }
                Thread.Sleep(1000);
            }

using EMX module, GHI Electronics NETMF SDK 2015 R1 Pre-Release 4, win 8.1 , netmf 4.3 , vs 2010

I have no idea what is wrong please help.

2

Did you switch to debugging using serial? Through the mode pin?