C# OCR Tesseract bug help a bug with reflection?

Hi I am trying to work on a windows form application based off this console application http://ift.tt/1An6JZl

Now when I run my application, I get the following exception, can anyone help with some clues as to what I need to do to fix it?

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at InteropDotNet.LibraryLoader.LoadLibrary(String fileName, String platformName)
   at InteropRuntimeImplementer.LeptonicaApiSignaturesInstance.LeptonicaApiSignaturesImplementation..ctor(LibraryLoader loader)
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark)
   at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
   at System.Activator.CreateInstance(Type type, Object[] args)
   at InteropDotNet.InteropRuntimeImplementer.CreateInstance[T]()
   at Tesseract.Interop.LeptonicaApi.Initialize()
   at Tesseract.Interop.TessApi.Initialize()
   at Tesseract.Interop.TessApi.get_Native()
   at Tesseract.TesseractEngine..ctor(String datapath, String language, EngineMode engineMode, IEnumerable`1 configFiles)
   at Tesseract.TesseractEngine..ctor(String datapath, String language, EngineMode engineMode)
   at TesseractWindowsOCR.Form1.button2_Click(Object sender, EventArgs e) in c:\Users\USERNAME\Documents\Visual Studio 2012\Projects\TesseractWindowsOCR\TesseractWindowsOCR\Form1.cs:line 39

Here is a sample of the code at line 39

private void button2_Click(object sender, EventArgs e)
    {
     //   string testImagePath= textBox1.Text;
        string testImagePath = @"C:\recog\image.jpg";
        string tessdataPath = @"C:\Users\USERNAME\Downloads\tesseract-master (1)\Samples\Tesseract.ConsoleDemo\tessdata";
        string langCode = "eng";

        try
        {
            var logger = new FormattedConsoleLogger();
            var resultPrinter = new ResultPrinter(logger);
            using (var engine = new TesseractEngine(@"./tessdata", "eng", EngineMode.Default))
            {
                using (var img = Pix.LoadFromFile(testImagePath))
                {
                    using (logger.Begin("Process image"))
                    {
                        var i = 1;
                        using (var page = engine.Process(img))
                        {
                            var text = page.GetText();
                            logger.Log("Text: {0}", text);
                            logger.Log("Mean confidence: {0}", page.GetMeanConfidence());

                            using (var iter = page.GetIterator())
                            {

Line 39 from above is specifically this

using (var engine = new TesseractEngine(@"./tessdata", "eng", EngineMode.Default))