图像中的EMGU CV人脸识别

I've been working with OpenCV before for C++ work and It was working great. Now, I'm developing a C# project and using EMGU CV for gender recognition. I've got problem with predict function. Every time I ran it, program crashed on Predict function, when I erased predict line, it is running. Here's my code:I've been working with OpenCV before for C++ wo