IronPython cannot import module cv2 (OpenCV)

First of all, the python code is perfectly working in PyCharm and in command prompt. So, Cv2 module is installed well on my Windows machine.

But when I run by IronPython Script engine, it failed as below.

IronPython.Runtime.Exceptions.ImportException: No module named cv2

I setup IronPython engine as below. Note that site-packages has cv2.pyd file.

var engine = Python.CreateEngine();
List<string> pathes = engine.GetSearchPaths().ToList();
pathes.AddRange(new[]
{
    @"C:\Python27\Lib\", @"C:\Python27\Lib\site-packages\"
});
engine.SetSearchPaths(pathes);

dynamic py = engine.ExecuteFile("sample.py"); // <- Exception occurred here.

I guess engine.Setup.FileExtensions has only .py file, so that cv2.pyd is not recognized. But, I hardly figure out how to add .pyd to the setup.

Or, is there anything that I missed?