WebFigures with dotNet only shows a static default image

My Matlab version is R2015b 64bit. I simply followed this help document: Quick Start Implementation of WebFigures to try the WebFigures with dotNET.

In Visual Studio (I tried both VS 2010 and VS 2013) I created a new web forms website under .NET Framework 4, then added the WebFigureControl to the default.aspx page.

Since the my matlab is 64 bit, I also followed the instruction on Advanced Configuration of a WebFigure to modify the web.config file.

When I debug the website in a browser (Chrome or IE), only this following static image shows up with no interactive buttons. I try to add the background c# code in default.aspx.cs to implement the myDeployedComponent.getPlot() method as instructed, the web page still shows this image, nothing changes.

There is no error message during the process.

Any idea on why this happens is very appreciated. Thanks.