New Post: Unable to connect to device

Hi,
I try to connect my pc (Windows 8 with Micro USB Adapter) with my device.
When I use connect method, I have always same error.

private void button1_Click(object sender, EventArgs e)
        {
            var radio = BluetoothRadio.PrimaryRadio;
            Console.WriteLine("* Radio, address: {0:C}", radio.LocalAddress);
            Console.WriteLine("Mode: " + radio.Mode.ToString());
            Console.WriteLine("Name: " + radio.Name + ", LmpSubversion: " + radio.LmpSubversion);
            Console.WriteLine("ClassOfDevice: " + radio.ClassOfDevice.ToString()
                + ", device: " + radio.ClassOfDevice.Device.ToString()
                + " / service: " + radio.ClassOfDevice.Service.ToString());
            Console.WriteLine("BluetoothRadio is supported ? " + BluetoothRadio.IsSupported);
            Console.WriteLine();
            radio.Mode = RadioMode.Discoverable;
            Console.WriteLine("Radio Mode now: " + radio.Mode.ToString());

            String[] ports = System.IO.Ports.SerialPort.GetPortNames();
            
            foreach(String port in ports){
                Console.WriteLine(port);
            }
            GetSerialPorts();

            // Lancer la découverte des Devices
           var cli = new BluetoothClient();
           BluetoothDeviceInfo[] peers = cli.DiscoverDevices();
            foreach (BluetoothDeviceInfo device in peers)
            {
                System.Console.WriteLine("Name : " + device.DeviceName);
                System.Console.WriteLine("Address : " + device.DeviceAddress);

                System.Console.WriteLine("SerialPort : " + BluetoothService.SerialPort);
                System.Console.WriteLine("Authenticated ? " + device.Authenticated + " Connected ? " + device.Connected);
                if ("Desire HD".Equals(device.DeviceName))
                {

                    BluetoothSecurity.PairRequest(device.DeviceAddress, "1234");//Déclenche la demande de connexion
                    System.Console.WriteLine("Authenticated ? " + device.Authenticated + " Connected ? " + device.Connected);

                    //device.SetServiceState(BluetoothService.SerialPort,true);
                    var ep = new BluetoothEndPoint(device.DeviceAddress, BluetoothService.SerialPort);//new Guid("{00001101-0000-1000-8000-00805f9b34fb}")
                    cli.Connect(ep);
                }
            }          
        }

        private static void GetSerialPorts()
        {
            SelectQuery q = new SelectQuery("Win32_SerialPort");
            ManagementObjectSearcher s = new ManagementObjectSearcher(q);
            foreach (object cur in s.Get())
            {
                ManagementObject mo = (ManagementObject)cur;
                object id = mo.GetPropertyValue("DeviceID");
                object pnpId = mo.GetPropertyValue("PNPDeviceID");
                Console.WriteLine("DeviceID:    {0} ", id);
                Console.WriteLine("PNPDeviceID: {0} ", pnpId);
                Console.WriteLine("");
            }//for
        }
    }

Console :

* Radio, address: 00:15:83:54:04:E1
Mode: Discoverable
Name: E553XXXX, LmpSubversion: 5276
ClassOfDevice: 120104, device: DesktopComputer / service: Network, ObjectTransfer
Le thread '<Sans nom>' (0x1580) s'est arrêté avec le code 0 (0x0).
BluetoothRadio is supported ? True

Radio Mode now: Discoverable
COM3
COM4
COM5
DeviceID:    COM3 
PNPDeviceID: PCI\VEN_8086&DEV_1E3D&SUBSYS_054A1028&REV_04\3&11583659&0&B3 

Name : Desire HD
Address : F8DB7FAB8F08
SerialPort : 00001101-0000-1000-8000-00805f9b34fb
Authenticated ? True Connected ? False
Authenticated ? True Connected ? False
Une exception de première chance de type 'InTheHand.Net.Bluetooth.BlueSoleil.BlueSoleilSocketException' s'est produite dans InTheHand.Net.Personal.dll
Une exception non gérée du type 'InTheHand.Net.Bluetooth.BlueSoleil.BlueSoleilSocketException' s'est produite dans InTheHand.Net.Personal.dll
Informations supplémentaires : Aucune connexion n’a pu être établie car l’ordinateur cible l’a expressément refusée

Sorry, error is in french.
I don't undestand what I must write. Any idea ?